[Wine] Re: Wine halt itself when the the window is out of focus.

[DanKegel]

This sounds like a common problem.  I see five or so bugs
with hang and focus in the title:

http://bugs.winehq.org/show_bug.cgi?id=18371
http://bugs.winehq.org/show_bug.cgi?id=16136
http://bugs.winehq.org/show_bug.cgi?id=15485
http://bugs.winehq.org/show_bug.cgi?id=14456

Might depend on the window manager.  Which desktop / WM are you using?