http://bugs.winehq.org/show_bug.cgi?id=17056
--- Comment #21 from Mohamed Mansour root@mohamedmansour.com 2009-05-19 11:11:08 --- It has something to do with the audio. Disable audio in wine-cfg (uncheck), and you can load the map correctly. If you enable audio for steam while playing TF2, it crashes while changing map.