Just a note for other users who may not have realised:
When using SDL-based programmes on Linux (*nix?) with dual-screens enabled via Xinerama, you will need to 'export SDL_VIDEO_X11_DGAMOUSE=0' before running QEMU (or whatever other SDL app, e.g. DosBox), otherwise the mouse misbehaves and can not be controlled properly in the programme.

This is the fix/solution to bug #10025:
http://savannah.nongnu.org/bugs/?func=detailitem&item_id=10025


Cheers,
--
Darryl Dixon <esrever_otua@pythonhacker.is-a-geek.net>