http://bugs.winehq.org/show_bug.cgi?id=23403
--- Comment #3 from Luke Bratch l_bratch@yahoo.co.uk 2010-07-03 09:01:11 --- I hadn't noticed the first time I read bug 20362, but now I see that some people are getting the "X11 pointer is visible but stuck" but other people are getting the "X11 pointer is visible and follows game pointer".
If bug 20362 is supposed to cover both issues, then this is a duplicate. I'm not certain if it is supposed to though.
To work around it, I get the Diablo2 window to minimize (by changing resolution with xrandr, then back); after restoring it, the X11 pointer is properly hidden.
Sadly Anarchy Online goes a bit crazy when changing the X resolution - lots of bits of the game interface fail to redraw properly.