http://bugs.winehq.org/show_bug.cgi?id=24579
--- Comment #42 from Vitaliy Margolen vitaliy-bugzilla@kievinfo.com 2012-01-02 11:22:17 CST --- (In reply to comment #41) Nope, it's fixed here. Can't reproduce anything you are talking about. Please update your system. And report to your distro.
Also make sure you are not trying to move/resize steam when its "busy". Windows does not allow you to do that. Wine can't prohibit that - it's the nature of X11.