http://bugs.winehq.org/show_bug.cgi?id=10614
--- Comment #7 from diafero@arcor.de 2007-12-01 09:51:01 --- I attached the output of the Myst Online startup with WINEDEBUG="cursor".
The moment when Myst switches to full screen is the first line saying something about clipping. All these "X11DRV_MotionNotify" are from the avatar selection (at least most of them).
On Windows, when I move the mouse above something klickable, it changes to two concentric circles. Using wine, there's also a change visible: The one I uploaded is shown above klickables, and for the "default" cursor the square is some pixels less high (the white line at the top of the cursor remains). However, the cursor change is not indicated at all in the log.