http://bugs.winehq.org/show_bug.cgi?id=3130
------- Additional Comments From even.rouault@mines-paris.org 2005-20-08 16:27 ------- I've encountered that bug too.
The only way I found to restore the original lef and right mouse buttons was to open regedit and change the value of HKEY_USERS/my_user_name/Wine/ControlPanel/Mouse/SwapMouseButtons from 1 back to 0... But the question is : why does Winword comes to put that dumb key in the registry !
I'm using Wine 20050524 but have also seen the bug on other versions.