diff -U3 -r --new-file drupal.old/modules/dblog/dblog.module drupal.new/modules/dblog/dblog.module
--- drupal.old/modules/dblog/dblog.module	2008-04-09 22:11:46.000000000 +0100
+++ drupal.new/modules/dblog/dblog.module	2009-08-21 15:12:09.698756181 +0100
@@ -139,7 +139,7 @@
     $log['severity'],
     $log['link'],
     $log['request_uri'],
-    $log['referer'],
+    substr ($log['referer'], 0, 128),
     $log['ip'],
     $log['timestamp']);