http://bugs.winehq.org/show_bug.cgi?id=1917
------- Additional Comments From jave27@gmail.com 2006-09-03 13:12 ------- Just tried with 2006-03-09 CVS and can confirm the issue still exists, but I don't know that it's truly an issue. It's just how fast the screen redraws take place and in what order. It's not just this app, every app in wine exhibits the same behaviour for me. I've seen Windows do similar things when the system is really busy. Here's how to reproduce (without the attachments):
Open any windowed app under wine. Now open another one and make it smaller so that you can see both apps. Drag the smaller app around, and you'll briefly see a trail of a "shadow" of the smaller app.
It appears that wine doesn't redraw the non-activated app until either the smaller window has either finished moving or at a certain timeout value. I'm not sure how the windowing code works exactly, but it seems to mimick original Windows fairly well, just that it doesn't redraw the non-active app quite as fast. Resizing a window in Wine has similar redraw issues.