diff --git a/include/filter.php b/include/filter.php
index fa249cb..f0f0bb1 100644
--- a/include/filter.php
+++ b/include/filter.php
@@ -42,8 +42,19 @@ function filter_gpc()
                     util_show_error_page_and_exit("Fatal error: ".$aKeys[$i]." should be an array.");
             break;
             default:
-                if($aKeys[$i]!="whq_appdb" && $aKeys[$i]!="MAX_FILE_SIZE") // whq_appdb is the name of the session cookie
+                if($aKeys[$i]!="whq_appdb" && // don't filter the appdb session cookie
+
+                   // or any bugzilla cookies
+                   $aKeys[$i]!="BUGLIST" &&
+                   $aKeys[$i]!="DEFAULTFORMAT" &&
+                   $aKeys[$i]!="Bugzilla_login" &&
+                   $aKeys[$i]!="LASTORDER" &&
+                   $aKeys[$i]!="Bugzilla_logincookie" &&
+                   $aKeys[$i]!="DEFAULTFORMAT" &&
+                   $aKeys[$i]!="MAX_FILE_SIZE")
+                { 
                     util_show_error_page_and_exit("Fatal error: type of variable ".$aKeys[$i]." is not recognized.");
+                }
             break;
         }
     }