http://bugs.winehq.org/show_bug.cgi?id=9452
--- Comment #5 from Philip J. Fry dabljuh@dabserver.dyndns.org 2007-09-23 17:52:33 --- (In reply to comment #3)
After more work and some assistance by #winehackers, I would like people who experience this problem (Steam fails to start with a structuredexception, since 0.9.43) to simply delete the Clientregistry.blob