This bug was fixed in the package xserver-xorg-input-vmmouse - 1:12.9.0-0ubuntu1
--------------- xserver-xorg-input-vmmouse (1:12.9.0-0ubuntu1) quantal; urgency=low
* New upstream bugfix release. - Fixes erratic mouse behavior with a Windows x64 host. (LP: #996821) - Fixes initialization when no other drivers request hardware access. -- Bryce Harrington <email address hidden> Tue, 12 Jun 2012 13:58:47 -0700
This bug was fixed in the package xserver- xorg-input- vmmouse - 1:12.9.0-0ubuntu1
--------------- xorg-input- vmmouse (1:12.9.0-0ubuntu1) quantal; urgency=low
xserver-
* New upstream bugfix release.
- Fixes erratic mouse behavior with a Windows x64 host. (LP: #996821)
- Fixes initialization when no other drivers request hardware access.
-- Bryce Harrington <email address hidden> Tue, 12 Jun 2012 13:58:47 -0700