http://bugs.winehq.org/show_bug.cgi?id=13065
--- Comment #14 from Mike Waters aa4mw@yahoo.com 2010-01-05 23:09:26 --- I have now tried both Wine 1.1.35 and Wine 1.2 from the repository on two systems. Both running Ubuntu Karmic with all current updates applied. Video is a Nvidia 8400GS on both machines and has been run both with the proprietary drivers and the open source drivers without notable change.
The problem is still apparent and still inconsistent - the windows can be restored by rebooting Poser.
The 64 bit OS is far worse than the 32 bit OS, otherwise no change. wine 1.135 to wine 1.2 shows a slight improvement, but not a fix.
My "quick test" is to left click on the top bar of the main view window and drag the window a little, as if you had resized the window and were trying to recenter it.
It takes between two and a dozen random moves to make this window disappear, apparently behind the background image. The window is dragged in a jerky fashion not consistent with mouse moves as if the processor is overwhelmed by the compute (the 64 bit hardware is an I7 at 4ghz, 6Gb RAM with 10% loading shown on the CPU activity monitor).
This particular behaviour is not repeatable using WIN XP 32 bit or 64 bit on the same hardware.
There are other ways to produce this symptom, but this seems to be very consistent.