Index: meta.php
===================================================================
--- meta.php	(revision 23299)
+++ meta.php	(working copy)
@@ -738,9 +738,10 @@
 			$meta_key = isset( $q['key'] ) ? trim( $q['key'] ) : '';
 			$meta_type = isset( $q['type'] ) ? strtoupper( $q['type'] ) : 'CHAR';
 
+			// Meta type validation
 			if ( 'NUMERIC' == $meta_type )
 				$meta_type = 'SIGNED';
-			elseif ( ! in_array( $meta_type, array( 'BINARY', 'CHAR', 'DATE', 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', 'UNSIGNED' ) ) )
+			elseif ( ! preg_match( '/^(?:BINARY|CHAR|DATE|DATETIME|SIGNED|UNSIGNED|TIME|DECIMAL(?:\(\d+(?:,\s*\d+)?\))?)$/', $meta_type ) )
 				$meta_type = 'CHAR';
 
 			$meta_value = isset( $q['value'] ) ? $q['value'] : null;