In case you’re using VMware Fusion on your Mac, you should check for updates:
VMware Fusion 4.1 is a free upgrade for current users of VMware Fusion 4. It is recommended for all users. VMware Fusion 4.1 includes new features and improvements including:
– Smart Full Screen. Builds on Lion full screen to deliver a great experience no matter how many displays you have. New Lion full screen button and keyboard shortcut, and updated full screen menu.
– Optionally start your favorite virtual machines when VMware Fusion starts.
Improved performance when starting virtual machines, resizing virtual machine windows and snappier animations.
– Graphics performance and compatibility improvements for Internet Explorer 9 and SolidWorks 2012.
– Support for FileVault 2 in Mac OS X 10.7.2 virtual machines.
– Many additional minor improvements and bug fixes
More information on the VMware blog.