http://bugs.winehq.org/show_bug.cgi?id=881
--- Comment #49 from Eli sharparrow1@yahoo.com 2008-01-26 11:03:43 --- The fact that this bug has been around so long is a bit insane.
Simplified testcase: Write a program with the following WM_SETCURSOR handler: SetCursor(NULL); return TRUE;
On Windows XP, that hides the cursor over the window; on Wine, it doesn't.