Apple, Inc. has released QuickTime 7.4.1 in February 6 and Security Update 2008-001 in February 11. If you use Ambrosia’s Snapz Pro X, beware of these updates. One of them, possibly QuickTime 7.4.1, is likely to disable Snapz Pro X 2.1.0 and 2.1.1 under OS X 10.4 Tiger. The latest version of Snapz Pro X is actually 2.1.2, which we have not tested. Anyway, either QuickTime 7.4.1 or Security Update 2008-001 is incompatible with Snapz Pro X. In such case, if you press Command + Shift + #3, you may not be able to move your Mouse and therefore cannot use Snapz Pro X at all.