Index: devel.module
===================================================================
--- devel.module	(revision 426)
+++ devel.module	(working copy)
@@ -431,9 +431,10 @@
   else {
     $type = 'watchdog';
   }
+  $log_entry['variables'] = (isset($log_entry['variables'])) ? $log_entry['variables'] : array();
   $watchdog = array(
     'type' => $log_entry['type'],
-    'message' => decode_entities(strtr($log_entry['message'], $log_entry['variables'])),
+    'message' => decode_entities(t($log_entry['message'], $log_entry['variables'])),
   );
   if (isset($log_entry['link'])) {
     $watchdog['link'] = $log_entry['link'];