diff --git a/js/config.js b/js/config.js
index 69a2e61ce..a5f94fa1b 100644
--- a/js/config.js
+++ b/js/config.js
@@ -169,7 +169,9 @@ var validate = {};
 // form validator list
 var validators = {
     // regexp: numeric value
-    _regexp_numeric: new RegExp('^[0-9]+$'),
+    _regexp_numeric: /^[0-9]+$/,
+    // regexp: extract parts from PCRE expression
+    _regexp_pcre_extract: /(.)(.*)\1(.*)?/,
     /**
      * Validates positive number
      *
@@ -210,41 +212,20 @@ var validators = {
         return result;
     },
     /**
-     * DefaultPropDisplay validator
+     * Validates value according to given regular expression
      *
      * @param {boolean} isKeyUp
+     * @param {string}  regexp
      */
-    validate_DefaultPropDisplay: function(isKeyUp) {
+    validate_by_regex: function(isKeyUp, regexp) {
         if (isKeyUp && this.value == '') {
             return true;
         }
-        var valid = this.value.match(/^(?:horizontal|vertical|[0-9]+)$/) != null;
+        // convert PCRE regexp
+        var parts = regexp.match(validators._regexp_pcre_extract);
+        var valid = this.value.match(new RegExp(parts[2], parts[3])) != null;
         return valid ? true : PMA_messages['error_invalid_value']
     },
-    /**
-     * Validates string length - must be 1 character long
-     *
-     * @param {boolean} isKeyUp
-     */
-    validate_str1: function (isKeyUp) {
-        if (isKeyUp && this.value == '') {
-            return true;
-        }
-        var result = this.value.length == 1;
-        return result ? true : PMA_messages['error_invalid_value'];
-    },
-    /**
-     * Validates string length - must be 0 or 1 character long
-     *
-     * @param {boolean} isKeyUp
-     */
-    validate_str01: function (isKeyUp) {
-        if (isKeyUp && this.value == '') {
-            return true;
-        }
-        var result = this.value.length <= 1;
-        return result ? true : PMA_messages['error_invalid_value'];
-    },
     // field validators
     _field: {
     },
@@ -259,7 +240,7 @@ var validators = {
  * @param {String}  id       field id
  * @param {String}  type     validator (key in validators object)
  * @param {boolean} onKeyUp  whether fire on key up
- * @param {object}  params   validation function parameters
+ * @param {Array}   params   validation function parameters
  */
 function validateField(id, type, onKeyUp, params) {
     if (typeof validators[type] == 'undefined') {
@@ -390,7 +371,11 @@ function validate_field(field, isKeyUp, errors) {
     errors[field_id] = [];
     var functions = getFieldValidators(field_id, isKeyUp);
     for (var i = 0; i < functions.length; i++) {
-        var result = functions[i][0].apply(field[0], [isKeyUp, functions[i][1]]);
+        var args = functions[i][1] != null
+            ? functions[i][1].slice(0)
+            : [];
+        args.unshift(isKeyUp);
+        var result = functions[i][0].apply(field[0], args);
         if (result !== true) {
             if (typeof result == 'string') {
             	result = [result];
diff --git a/libraries/config.values.php b/libraries/config.values.php
index 24977fd72..0fde51250 100644
--- a/libraries/config.values.php
+++ b/libraries/config.values.php
@@ -27,6 +27,7 @@ $cfg_db['Servers'] = array(1 => array(
 $cfg_db['RecodingEngine'] = array('auto', 'iconv', 'recode');
 $cfg_db['DefaultCharset'] = $GLOBALS['cfg']['AvailableCharsets'];
 $cfg_db['OBGzip'] = array('auto', true, false);
+$cfg_db['MemoryLimit'] = 'short_string';
 $cfg_db['ShowTooltipAliasTB'] = array('nested', true, false);
 $cfg_db['DisplayDatabasesList'] = array('auto', true, false);
 $cfg_db['LeftLogoLinkWindow'] = array('main', 'new');
@@ -36,6 +37,8 @@ $cfg_db['LeftDefaultTabTable'] = array(
     'tbl_select.php',    // search page
     'tbl_change.php',    // insert row page
     'sql.php');          // browse page
+$cfg_db['LeftFrameDBSeparator'] = 'short_string';
+$cfg_db['LeftFrameTableSeparator'] = 'short_string';
 $cfg_db['NavigationBarIconic'] = array(true, false, 'both');
 $cfg_db['Order'] = array('ASC', 'DESC', 'SMART');
 $cfg_db['ProtectBinary'] = array(false, 'blob', 'all');
@@ -77,6 +80,12 @@ $cfg_db['Import']['sql_compatibility'] = $cfg_db['Export']['sql_compatibility']
     // can't be read by POSTGRESQL (see our bug #1596328)
     //'POSTGRESQL',
     'TRADITIONAL');
+$cfg_db['Import']['csv_terminated'] = 'short_string';
+$cfg_db['Import']['csv_enclosed'] = 'short_string';
+$cfg_db['Import']['csv_escaped'] = 'short_string';
+$cfg_db['Import']['ldi_terminated'] = 'short_string';
+$cfg_db['Import']['ldi_enclosed'] = 'short_string';
+$cfg_db['Import']['ldi_escaped'] = 'short_string';
 $cfg_db['Import']['ldi_local_option'] = array('auto', true, false);
 $cfg_db['Export']['format'] = array('codegen', 'csv', 'excel', 'htmlexcel',
     'htmlword', 'latex', 'ods', 'odt', 'pdf', 'sql', 'texytext', 'xls', 'xml',
@@ -84,9 +93,21 @@ $cfg_db['Export']['format'] = array('codegen', 'csv', 'excel', 'htmlexcel',
 $cfg_db['Export']['compression'] = array('none', 'zip', 'gzip', 'bzip2');
 $cfg_db['Export']['charset'] = array_merge(array(''), $GLOBALS['cfg']['AvailableCharsets']);
 $cfg_db['Export']['codegen_format'] = array('#', 'NHibernate C# DO', 'NHibernate XML');
+$cfg_db['Export']['csv_separator'] = 'short_string';
+$cfg_db['Export']['csv_terminated'] = 'short_string';
+$cfg_db['Export']['csv_enclosed'] = 'short_string';
+$cfg_db['Export']['csv_escaped'] = 'short_string';
+$cfg_db['Export']['csv_null'] = 'short_string';
+$cfg_db['Export']['excel_null'] = 'short_string';
 $cfg_db['Export']['excel_edition'] = array('win' => 'Windows',
     'mac_excel2003' => 'Excel 2003 / Macintosh', 'mac_excel2008' => 'Excel 2008 / Macintosh');
 $cfg_db['Export']['sql_type'] = array('INSERT', 'UPDATE', 'REPLACE');
+$cfg_db['Export']['xls_null'] = 'short_string';
+$cfg_db['Export']['xlsx_null'] = 'short_string';
+$cfg_db['Export']['htmlword_null'] = 'short_string';
+$cfg_db['Export']['ods_null'] = 'short_string';
+$cfg_db['Export']['odt_null'] = 'short_string';
+$cfg_db['Export']['texytext_null'] = 'short_string';
 
 /**
  * Default values overrides
@@ -104,16 +125,16 @@ $cfg_db['_overrides']['Servers/1/extension'] = extension_loaded('mysqli')
 $cfg_db['_validators'] = array(
     'CharTextareaCols' => 'validate_positive_number',
     'CharTextareaRows' => 'validate_positive_number',
-    'DefaultPropDisplay' => 'validate_DefaultPropDisplay',
+    'DefaultPropDisplay' => array('validate_by_regex', '/^(?:horizontal|vertical|\d+)$/'),
     'ExecTimeLimit' => 'validate_non_negative_number',
     'Export/sql_max_query_size' => 'validate_positive_number',
     'ForeignKeyMaxLimit' => 'validate_positive_number',
-    'Import/csv_enclosed' => 'validate_str01',
-    'Import/csv_escaped' => 'validate_str1',
-    'Import/csv_terminated' => 'validate_str1',
-    'Import/ldi_enclosed' => 'validate_str01',
-    'Import/ldi_escaped' => 'validate_str1',
-    'Import/ldi_terminated' => 'validate_str1',
+    'Import/csv_enclosed' => array('validate_by_regex', '/^.?$/'),
+    'Import/csv_escaped' => array('validate_by_regex', '/^.$/'),
+    'Import/csv_terminated' => array('validate_by_regex', '/^.$/'),
+    'Import/ldi_enclosed' => array('validate_by_regex', '/^.?$/'),
+    'Import/ldi_escaped' => array('validate_by_regex', '/^.$/'),
+    'Import/ldi_terminated' => array('validate_by_regex', '/^.$/'),
     'Import/skip_queries' => 'validate_non_negative_number',
     'InsertRows' => 'validate_positive_number',
     'LeftFrameTableLevel' => 'validate_positive_number',
@@ -124,7 +145,7 @@ $cfg_db['_validators'] = array(
     'MaxCharactersInDisplayedSQL' => 'validate_positive_number',
     'MaxRows' => 'validate_positive_number',
     'MaxTableList' => 'validate_positive_number',
-    'MemoryLimit' => 'validate_non_negative_number',
+    'MemoryLimit' => array('validate_by_regex', '/^\d+(?:[kmg])?$/i'),
     'QueryHistoryMax' => 'validate_positive_number',
     'QueryWindowWidth' => 'validate_positive_number',
     'QueryWindowHeight' => 'validate_positive_number',
diff --git a/libraries/config/FormDisplay.class.php b/libraries/config/FormDisplay.class.php
index 1234e01c7..350dec1db 100644
--- a/libraries/config/FormDisplay.class.php
+++ b/libraries/config/FormDisplay.class.php
@@ -151,7 +151,7 @@ class FormDisplay
         }
 
         // run validation
-        $errors = validate($paths, $values, false);
+        $errors = PMA_config_validate($paths, $values, false);
 
         // change error keys from canonical paths to work paths
         if (is_array($errors) && count($errors) > 0) {
@@ -259,10 +259,10 @@ class FormDisplay
             foreach ($this->js_lang_strings as $strName => $strValue) {
                 $js_lang[] = "'$strName': '" . PMA_jsFormat($strValue, false) . '\'';
             }
-            $js[] = '$.extend(PMA_messages, {' . implode(",\n\t", $js_lang) . '})';
+            $js[] = "$.extend(PMA_messages, {\n\t" . implode(",\n\t", $js_lang) . '})';
         }
 
-        $js[] = '$.extend(defaultValues, {' . implode(",\n\t", $js_default) . '})';
+        $js[] = "$.extend(defaultValues, {\n\t" . implode(",\n\t", $js_default) . '})';
         display_js($js);
     }
 
@@ -309,11 +309,12 @@ class FormDisplay
             case 'string':
                 $type = 'text';
                 break;
-            case 'double':
-                $type = 'text';
+            case 'short_string':
+                $type = 'short_text';
                 break;
+            case 'double':
             case 'integer':
-                $type = 'text';
+                $type = 'number_text';
                 break;
             case 'boolean':
                 $type = 'checkbox';
@@ -353,6 +354,8 @@ class FormDisplay
         $js_line = '\'' . $translated_path . '\': ';
         switch ($type) {
             case 'text':
+            case 'short_text':
+            case 'number_text':
                 $js_line .= '\'' . PMA_escapeJsString($value_default) . '\'';
                 break;
             case 'checkbox':
@@ -474,16 +477,17 @@ class FormDisplay
             foreach ($form->fields as $field => $system_path) {
                 $work_path = array_search($system_path, $this->system_paths);
                 $key = $this->translated_paths[$work_path];
+                $type = $form->getOptionType($field);
 
                 // skip groups
-                if ($form->getOptionType($field) == 'group') {
+                if ($type == 'group') {
                     continue;
                 }
 
                 // ensure the value is set
                 if (!isset($_POST[$key])) {
                     // checkboxes aren't set by browsers if they're off
-                    if ($form->getOptionType($field) == 'boolean') {
+                    if ($type == 'boolean') {
                         $_POST[$key] = false;
                     } else {
                         $this->errors[$form->name][] = sprintf(
@@ -505,7 +509,6 @@ class FormDisplay
                 }
 
                 // cast variables to correct type
-                $type = $form->getOptionType($field);
                 switch ($type) {
                     case 'double':
                         settype($_POST[$key], 'float');
@@ -524,6 +527,7 @@ class FormDisplay
                         }
                         break;
                     case 'string':
+                    case 'short_string':
                         $_POST[$key] = trim($_POST[$key]);
                         break;
                     case 'array':
diff --git a/libraries/config/FormDisplay.tpl.php b/libraries/config/FormDisplay.tpl.php
index b8188201c..e05a583a5 100644
--- a/libraries/config/FormDisplay.tpl.php
+++ b/libraries/config/FormDisplay.tpl.php
@@ -43,7 +43,8 @@ function display_form_top($action = null, $method = 'post', $hidden_fields = nul
  *
  * @param array $tabs
  */
-function display_tabs_top($tabs) {
+function display_tabs_top($tabs)
+{
 ?>
 <ul class="tabs">
 <?php foreach ($tabs as $tab_id => $tab_name): ?>
@@ -163,7 +164,15 @@ function display_input($path, $name, $description = '', $type, $value, $value_is
     <?php
     switch ($type) {
         case 'text':
-            echo '<input type="text" size="50" ' . $name_id . $field_class
+            echo '<input type="text" size="60" ' . $name_id . $field_class
+                . ' value="' . htmlspecialchars($value) . '" />';
+          break;
+        case 'short_text':
+            echo '<input type="text" size="25" ' . $name_id . $field_class
+                . ' value="' . htmlspecialchars($value) . '" />';
+          break;
+        case 'number_text':
+            echo '<input type="text" size="15" ' . $name_id . $field_class
                 . ' value="' . htmlspecialchars($value) . '" />';
           break;
         case 'checkbox':
@@ -318,7 +327,8 @@ function display_fieldset_bottom_simple()
 /**
  * Closes form tabs
  */
-function display_tabs_bottom() {
+function display_tabs_bottom()
+{
     echo "</div>\n";
 }
 
@@ -337,8 +347,16 @@ function display_form_bottom()
  * @param string $validator
  * @param array  $js_array
  */
-function js_validate($field_id, $validator, &$js_array) {
-    $js_array[] = "validateField('$field_id', '$validator', true)";
+function js_validate($field_id, $validator, &$js_array)
+{
+    $validator = (array)$validator;
+    $v_name = array_shift($validator);
+    $v_args = array();
+    foreach ($validator as $arg) {
+        $v_args[] = PMA_escapeJsString($arg);
+    }
+    $v_args = $v_args ? ", ['" . implode("', '", $v_args) . "']" : '';
+    $js_array[] = "validateField('$field_id', '$v_name', true$v_args)";
 }
 
 /**
@@ -346,7 +364,8 @@ function js_validate($field_id, $validator, &$js_array) {
  *
  * @param array $js_array
  */
-function display_js($js_array) {
+function display_js($js_array)
+{
     if (empty($js_array)) {
         return;
     }
@@ -363,7 +382,8 @@ function display_js($js_array) {
  * @param string $name
  * @param array  $error_list
  */
-function display_errors($name, $error_list) {
+function display_errors($name, $error_list)
+{
     echo '<dl>';
     echo '<dt>' . htmlspecialchars($name) . '</dt>';
     foreach ($error_list as $error) {
diff --git a/libraries/config/setup.forms.php b/libraries/config/setup.forms.php
index ca0f5b649..dd93bc6aa 100644
--- a/libraries/config/setup.forms.php
+++ b/libraries/config/setup.forms.php
@@ -30,7 +30,7 @@ $forms['Servers']['Server'] = array('Servers' => array(1 => array(
     'connect_type',
     'extension',
     'compress',
-    'auth_type',
+    'auth_type' => ':group',
     'auth_http_realm',
     'user',
     'password',
diff --git a/libraries/config/validate.lib.php b/libraries/config/validate.lib.php
index 54a0c6d94..92b05ead6 100644
--- a/libraries/config/validate.lib.php
+++ b/libraries/config/validate.lib.php
@@ -29,7 +29,7 @@
  * @param bool          $isPostSource  tells whether $values are directly from POST request
  * @return bool|array
  */
-function validate($validator_id, &$values, $isPostSource)
+function PMA_config_validate($validator_id, &$values, $isPostSource)
 {
     // find validators
     $cf = ConfigFile::getInstance();
@@ -59,7 +59,12 @@ function validate($validator_id, &$values, $isPostSource)
     // validate
     $result = array();
     foreach ($vids as $vid) {
-        $r = call_user_func($validators[$vid], $vid, $arguments);
+        // call appropriate validation function
+        $vdef = (array) $validators[$vid];
+        $vname = array_shift($vdef);
+        $args = array_merge(array($vid, &$arguments), $vdef);
+        $r = call_user_func_array($vname, $args);
+
         // merge results
         if (is_array($r)) {
             foreach ($r as $key => $error_list) {
@@ -299,7 +304,6 @@ function validate_trusted_proxies($path, $values)
     return $result;
 }
 
-
 /**
  * Tests integer value
  *
@@ -361,41 +365,31 @@ function validate_non_negative_number($path, $values)
 }
 
 /**
- * Validates DefaultPropDisplay field
+ * Validates value according to given regular expression
+ * Pattern and modifiers must be a valid for PCRE <b>and</b> JavaScript RegExp
  *
  * @param string $path
- * @param array $values
- * @return array
+ * @param array  $values
+ * @param string $regex
+ * @return void
  */
-function validate_DefaultPropDisplay($path, $values)
+function validate_by_regex($path, $values, $regex)
 {
-    $result = preg_match('/^(?:horizontal|vertical|\d+)$/',  $values[$path]);
+    $result = preg_match($regex, $values[$path]);
     return array($path => ($result ? '' : __('Incorrect value')));
 }
 
 /**
- * Validates string length - must be 1 character long
- *
+ * Validates upper bound for numeric inputs
+ * 
  * @param string $path
- * @param array $values
+ * @param array  $values
+ * @param int    $max_value
  * @return array
  */
-function validate_str1($path, $values)
+function validate_upper_bound($path, $values, $max_value)
 {
-    $result = strlen($values[$path]) == 1;
-    return array($path => ($result ? '' : __('Incorrect value')));
-}
-
-/**
- * Validates string length - must be 0 or 1 character long
- *
- * @param string $path
- * @param array $values
- * @return array
- */
-function validate_str01($path, $values)
-{
-    $result = strlen($values[$path]) <= 1;
-    return array($path => ($result ? '' : __('Incorrect value')));
+    $result = $values[$path] <= $max_value;
+    return array($path => ($result ? '' : sprintf(__('Value must be equal or lower than %s'), $max_value)));
 }
 ?>
\ No newline at end of file
diff --git a/setup/validate.php b/setup/validate.php
index c4441184d..e8d7a7f6d 100644
--- a/setup/validate.php
+++ b/setup/validate.php
@@ -24,7 +24,7 @@ if (!($values instanceof stdClass)) {
     die('Wrong data');
 }
 $values = (array)$values;
-$result = validate($vids, $values, true);
+$result = PMA_config_validate($vids, $values, true);
 if ($result === false) {
     $result = 'Wrong data or no validation for ' . $vids;
 }