http://bugs.winehq.org/show_bug.cgi?id=27779
--- Comment #35 from Kaj F. linuxgeek1994@gmail.com 2011-07-25 13:52:35 CDT --- (In reply to comment #34)
Are you running the games in virtual desktop mode?
No, I am running them in windowed mode using the launch options through Steam (e.g. for Portal, adding the -windowed parameter), and I am not seeing this issue on any of my Source Engine or other Steam games that run in windowed mode. However, in RealMYST, which has no windowed mode available, I am seeing the issue, in both virtual desktop mode and normal mode.