diff -Naur mantis/adm_config_edit.php mantis-test/adm_config_edit.php
--- mantis/adm_config_edit.php	1970-01-01 01:00:00.000000000 +0100
+++ mantis-test/adm_config_edit.php	2011-10-06 09:28:55.000000000 +0200
@@ -0,0 +1,176 @@
+<?php
+# MantisBT - a php based bugtracking system
+
+# MantisBT is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# MantisBT is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with MantisBT.  If not, see <http://www.gnu.org/licenses/>.
+
+	/**
+	 * @package MantisBT
+	 * @copyright Copyright (C) 2000 - 2002  Kenzaburo Ito - kenito@300baud.org
+	 * @copyright Copyright (C) 2002 - 2011  MantisBT Team - mantisbt-dev@lists.sourceforge.net
+	 * @link http://www.mantisbt.org
+	 */
+	 /**
+	  * MantisBT Core API's
+	  */
+	require_once( 'core.php' );
+
+	access_ensure_project_level( config_get( 'set_configuration_threshold' ) );
+
+	html_page_top( lang_get( 'configuration_report' ) );
+
+	print_manage_menu( 'adm_config_report.php' );
+	print_manage_config_menu( 'adm_config_report.php' );
+
+	function print_config_value_as_string( $p_type, $p_value ) {
+		$t_corrupted = false;
+
+		switch( $p_type ) {
+			case CONFIG_TYPE_FLOAT:
+				$t_value = (float)$p_value;
+				echo $t_value;
+				return;
+			case CONFIG_TYPE_INT:
+				$t_value = (integer)$p_value;
+				echo $t_value;
+				return;
+			case CONFIG_TYPE_STRING:
+				$t_value = config_eval( $p_value );
+				echo string_html_specialchars( "$t_value" );
+				return;
+			case CONFIG_TYPE_COMPLEX:
+				$t_value = @unserialize( $p_value );
+				if ( $t_value === false ) {
+					$t_corrupted = true;
+				}
+				break;
+			default:
+				$t_value = config_eval( $p_value );
+				break;
+		}
+
+		if ( $t_corrupted ) {
+			echo lang_get( 'configuration_corrupted' );
+		} else {
+			if ( function_exists( 'var_export' ) ) {
+				var_export( $t_value );
+			} else {
+				print_r( $t_value );
+			}
+		}
+
+	}
+
+	$f_config_user_id = gpc_get_int( 'user_id' );
+	$f_config_project_id = gpc_get_int( 'project_id' );
+	$f_config_option = gpc_get_string( 'config_option' );
+
+	$t_config_table = db_get_table( 'mantis_config_table' );
+	$query = "SELECT type, value, access_reqd FROM $t_config_table
+			WHERE config_id = " . db_param() . " AND
+				project_id = " . db_param() . " AND
+				user_id = " . db_param();
+	$result = db_query_bound( $query, Array( $f_config_option, $f_config_project_id, $f_config_user_id ) );
+
+	# make sure that configuration option specified is found in database
+	if ( db_num_rows( $result ) != 1 ) {
+		$t_not_found_value = '***CONFIG OPTION NOT FOUND***';
+		error_parameters( $f_config_option );
+		trigger_error( ERROR_CONFIG_OPT_NOT_FOUND, ERROR );
+	}
+
+	$row = db_fetch_array( $result );
+
+	$t_config_type_id = $row['type'];
+	$t_config_value = $row['value'];
+
+?>
+<br />
+<div align="center">
+<!-- Config Edit Form -->
+<form name="edit_config_form" method="post" action="adm_config_set.php">
+<?php echo form_security_field( 'adm_config_set' ) ?>
+<table class="width75" cellspacing="1">
+
+<!-- Title -->
+<tr>
+	<td class="form-title" colspan="2">
+		<?php echo lang_get( 'edit_configuration_option' ) ?>
+	</td>
+</tr>
+<tr <?php echo helper_alternate_class() ?> valign="top">
+	<td>
+		<?php echo lang_get( 'username' ) ?>
+	</td>
+	<td>
+		<select name="user_id">
+			<option value="0" selected="selected"><?php echo lang_get( 'all_users' ); ?></option>
+			<?php print_user_option_list( $f_config_user_id ) ?>
+		</select>
+	</td>
+</tr>
+<tr <?php echo helper_alternate_class() ?> valign="top">
+	<td>
+		<?php echo lang_get( 'project_name' ) ?>
+	</td>
+	<td>
+		<select name="project_id">
+			<option value="0" selected="selected"><?php echo lang_get( 'all_projects' ); ?></option>
+			<?php print_project_option_list( $f_config_project_id, false ) ?>
+		</select>
+	</td>
+</tr>
+<tr <?php echo helper_alternate_class() ?> valign="top">
+	<td>
+		<?php echo lang_get( 'configuration_option' ) ?>
+	</td>
+	<td>
+			<input type="text" name="config_option" value="<?php echo $f_config_option ?>" size="64" maxlength="64"/>
+	</td>
+</tr>
+<tr <?php echo helper_alternate_class() ?> valign="top">
+	<td>
+		<?php echo lang_get( 'configuration_option_type' ) ?>
+	</td>
+	<td>
+		<select name="type">
+			<option value="default">default</option>
+			<option value="string" <?php check_selected( CONFIG_TYPE_STRING, $t_config_type_id ) ?>>string</option>
+			<option value="integer" <?php check_selected( CONFIG_TYPE_INT, $t_config_type_id ) ?>>integer</option>
+			<option value="complex" <?php check_selected( CONFIG_TYPE_COMPLEX, $t_config_type_id ) ?>>complex</option>
+		</select>
+	</td>
+</tr>
+<tr <?php echo helper_alternate_class() ?> valign="top">
+	<td>
+		<?php echo lang_get( 'configuration_option_value' ) ?>
+	</td>
+	<td>
+			<textarea name="value" cols="80" rows="10"><?php print_config_value_as_string( $t_config_type_id, $t_config_value ); ?></textarea>
+	</td>
+</tr>
+<tr>
+	<td colspan="2" class="center">
+			<input type="submit" name="config_set" class="button" value="<?php echo lang_get( 'set_configuration_option' ) ?>" />
+			</form>
+			<?php
+				if ( config_can_delete( $v_config_id ) ) {
+					print_button( "adm_config_delete.php?user_id=$f_config_user_id&project_id=$f_config_project_id&config_option=$f_config_option", lang_get( 'delete_link' ) );
+				}
+			?>
+	</td>
+</tr>
+</table>
+</div>
+<?php
+	html_page_bottom();
diff -Naur mantis/adm_config_report.php mantis-test/adm_config_report.php
--- mantis/adm_config_report.php	2011-07-26 15:49:10.000000000 +0200
+++ mantis-test/adm_config_report.php	2011-10-06 08:59:06.000000000 +0200
@@ -152,9 +152,18 @@
 			</td>
 			<td class="center">
 				<?php
-					if ( config_can_delete( $v_config_id ) ) {
+					$t_config_can_delete = config_can_delete( $v_config_id );
+					$t_config_can_edit = config_can_edit( $v_config_id );
+
+					if ( $t_config_can_delete ) {
 						print_button( "adm_config_delete.php?user_id=$v_user_id&project_id=$v_project_id&config_option=$v_config_id", lang_get( 'delete_link' ) );
-					} else {
+					}
+					/* Only make stings und integers editable */
+					if ( $t_config_can_edit && ( $v_type == CONFIG_TYPE_STRING || $v_type == CONFIG_TYPE_INT ) ) {
+						print_button( "adm_config_edit.php?user_id=$v_user_id&project_id=$v_project_id&config_option=$v_config_id", lang_get( 'edit_link' ) );
+					}
+
+					if ( !$t_config_can_delete && !$t_config_can_edit ) {
 						echo '&#160;';
 					}
 				?>
diff -Naur mantis/core/config_api.php mantis-test/core/config_api.php
--- mantis/core/config_api.php	2011-07-26 15:49:10.000000000 +0200
+++ mantis-test/core/config_api.php	2011-10-05 16:45:21.000000000 +0200
@@ -435,6 +435,12 @@
 }
 
 # ------------------
+# Checks if the specific configuration option can be edited in the database.
+function config_can_edit( $p_option ) {
+	return( utf8_strtolower( $p_option ) != 'database_version' );
+}
+
+# ------------------
 # delete the config entry
 function config_delete( $p_option, $p_user = ALL_USERS, $p_project = ALL_PROJECTS ) {
 	global $g_cache_config, $g_cache_config_access;
diff -Naur mantis/lang/strings_english.txt mantis-test/lang/strings_english.txt
--- mantis/lang/strings_english.txt	2011-07-26 15:49:10.000000000 +0200
+++ mantis-test/lang/strings_english.txt	2011-10-05 17:21:04.000000000 +0200
@@ -841,6 +841,7 @@
 $s_configuration_option_value = 'Value';
 $s_all_users = 'All Users';
 $s_set_configuration_option = 'Set Configuration Option';
+$s_edit_configuration_option = 'Edit Configuration Option';
 $s_delete_config_sure_msg = 'Are you sure you wish to delete this configuration option?';
 $s_configuration_corrupted = 'The configuration in the database is corrupted.';
 
diff -Naur mantis/lang/strings_german.txt mantis-test/lang/strings_german.txt
--- mantis/lang/strings_german.txt	2011-07-26 15:49:10.000000000 +0200
+++ mantis-test/lang/strings_german.txt	2011-10-05 17:23:01.000000000 +0200
@@ -696,6 +696,7 @@
 $s_configuration_option_value = 'Wert';
 $s_all_users = 'Alle Benutzer';
 $s_set_configuration_option = 'Speichere Konfigurations-Option';
+$s_edit_configuration_option = 'Bearbeite Konfigurations-Option';
 $s_delete_config_sure_msg = 'Sind Sie sicher, dass Sie diese Konfigurationsoption löschen möchten?';
 $s_configuration_corrupted = 'Ungültige Konfiguration in der Datenbank';
 $s_plugin = 'Plugin';