Thanks Windows XP Stuff for this one. Many people have upgraded to Windows Media Player Series 9 only to find compatibility problems. Blistering-Games is the only known place that provides a fix to the wmadmod.dll error and also improves the speed of MP3 playing in the player.
Blistering-Games is the first to release a fix for the Media Player Series 9 bug whereby Media Player errors when playing certain MP3-encoded files.
Certainly worth checking out if you've got the new Media Player 9.
Download: WMP9 Fix
News source: Blistering Games