Last week, I appended about this problem: Application windows under wine disappear if you switch to a different virtual desktop and then back under either AfterStep or Enlightenment window managers. The program is still apparently running (according to top), but there is no way to retrieve it and it no longer appears in the window manager's window list. It has to be killed off and restarted.
I have now isolated the problem to the change made to wine/dlls/x11drv/winpos.c in patch http://cvs.winehq.org/patch.py?id=12173 on 4/27/2004. I do not know enough to take it further.
For what it is worth, today's cvs wine with a 4/26 version of winpos.c seems to work just fine.
Thanks, Paul z/OS core components development Internet: prs@us.ibm.com