This is most commonly due to installing Photoshop CS before doing an archive and install of Mac OS10.3.Source: Adobe ForumsThe easiest solution is to reinstall Photoshop CS after you have installed Mac OS10.3 or OS 10.4 Easiest way to reinstall Photoshop without disturbing the original install is to install to your desktop. after the install is done just trash the Photoshop folder on the desktop.
Another mystery solved! This is such an annoying problem that I now know how to fix at work.
