diff --git a/ChangeLog b/ChangeLog
index a2b4a165c..b8d3bdd12 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -8,6 +8,9 @@ $Source$
 2003-05-22 Michal Cihar  <nijel@users.sourceforge.net>
     * tbl_indexes.php3, libraries/common.lib.php3: Better tabs highlighting
       when editing indexes.
+    * tbl_replace_fields.php3, libraries/build_dump.lib.php3,
+      libraries/display_tbl.lib.php3: Don't hexify BLOB if it is empty (bug
+      #741599).
 
 2003-05-22 Garvin Hicking <me@supergarv.de>
     * sql.php3, libraries/common.lib.php3: Bug #692854: Never execute
diff --git a/libraries/build_dump.lib.php3 b/libraries/build_dump.lib.php3
index e91925d87..1224f7891 100644
--- a/libraries/build_dump.lib.php3
+++ b/libraries/build_dump.lib.php3
@@ -327,8 +327,8 @@ if (!defined('PMA_BUILD_DUMP_LIB_INCLUDED')){
                         // a number
                         if ($field_num[$j]) {
                             $values[] = $row[$j];
-                        // a blob
-                        } else if ($field_blob[$j]) {
+                        // a not empty blob
+                        } else if ($field_blob[$j] && !empty($row[$j])) {
                             $values[] = '0x' . bin2hex($row[$j]);
                         // a string
                         } else {
@@ -465,7 +465,7 @@ if (!defined('PMA_BUILD_DUMP_LIB_INCLUDED')){
                         $type == 'bigint'  ||$type == 'timestamp') {
                         $schema_insert .= $row[$j] . ', ';
                     // blob
-                    } else if ($type == 'blob' || $type == 'mediumblob' || $type == 'largeblob' || $type == 'tinyblob') {
+                    } else if (($type == 'blob' || $type == 'mediumblob' || $type == 'largeblob' || $type == 'tinyblob') && !empty($row[$j])) {
                         $schema_insert .= '0x' . bin2hex($row[$j]) . ', ';
                     // a string
                     } else {
diff --git a/libraries/display_tbl.lib.php3 b/libraries/display_tbl.lib.php3
index 757fbc727..3eedbd411 100644
--- a/libraries/display_tbl.lib.php3
+++ b/libraries/display_tbl.lib.php3
@@ -961,8 +961,9 @@ if (!defined('PMA_DISPLAY_TBL_LIB_INCLUDED')) {
                             $condition .= 'IS NULL AND';
                         } else {
                             if ($meta->type == 'blob'
-                                // hexify only if this is a true BLOB
-                                 && eregi('BINARY', $field_flags)) {
+                                // hexify only if this is a true not empty BLOB
+                                 && eregi('BINARY', $field_flags)
+                                 && !empty($row[$pointer])) {
                                     $condition .= 'LIKE 0x' . bin2hex($row[$pointer]). ' AND';
                             } else {
                                 $condition .= '= \'' . PMA_sqlAddslashes($row[$pointer], FALSE, TRUE) . '\' AND';
diff --git a/tbl_replace_fields.php3 b/tbl_replace_fields.php3
index 311161cda..a966de29d 100755
--- a/tbl_replace_fields.php3
+++ b/tbl_replace_fields.php3
@@ -163,7 +163,7 @@ if (!$check_stop) {
                     // mode, insert empty field because no values were submitted. If protected
                     // blobs where set, insert original fields content.
                     if (isset($fieldlist)) {
-                        if (isset($prot_row) && isset($prot_row[$key]) && $prot_row[$key] != '') {
+                        if (isset($prot_row) && isset($prot_row[$key]) && !empty($prot_row[$key])) {
                             $val = '0x' . bin2hex($prot_row[$key]);
                             $seen_binary = TRUE;
                         } else {