http://bugs.winehq.org/show_bug.cgi?id=20468
--- Comment #5 from Justin Soulia rockinup1231@gmail.com 2009-10-25 22:00:08 --- I've tested it as much as I possibly could to invoke a crash, but I don't encounter one. I even got Xfire to work ingame on Halo.
Also, looking at that terminal output, the crash was not dissimilar from what I saw prior to the bug being fixed.
The only time xfire seems to crash is when wine-gecko is not installed, in which case the gui won't even load before crashing.