http://bugs.winehq.org/show_bug.cgi?id=22906
--- Comment #5 from Danilo Pianini danilo.pianini@gmail.com 2010-09-06 01:42:19 CDT --- I tried all the keys of my keyboard and nothing worked as workaround. To complete my previous intervention, I must say that running in full screen modifying the ini options file fixes the mouse position detection.
Tested on Sabayon 5.3