http://bugs.winehq.org/show_bug.cgi?id=7403
--- Comment #33 from Alexandre Julliard julliard@winehq.org 2008-06-13 07:12:17 --- (In reply to comment #32)
With one monitor active, at say 1920x1200, everything does work fine. But as soon as I switch resolution to 3200x1600 causing my second monitor to switch on, the systray icon disappears and loses all functionality. The space where the icon was is now empty, as if it was simply invisible, but sometimes the icons of other systray apps appear there. It stays that way until I switch back to 1920x1600, left monitor turns off, I restart wine, and systray is back and working again.
Resizing the desktop window on the fly is not supported at the moment, it's not specific to systray. This is bug 13034.