Recently "rediscovered" M:TW and was getting some tools together. Went to the Clan Berserk site, and tried to download the Unit Calculator tool, and got the following message:

message_die() was called multiple times. This isn't supposed to happen. Was message_die() used in page_tail.php?
I tried Internet Explorer and Firefox (used this earlier), no good result. Is there another source for the Unit Calculator?