Wow is that a new feature of CS 5? I can't wait I would trash the preferences.
CS2 on an Intel-Mac maybe???
CS3 on the Intel Mac. An inconvenient reboot solved the problem. Weird, though.
I've seen it a couple times. It's a Rosetta issue on Intel Macs with PPC apps. And yes, relaunching the App will cure it.. sometimes a machine reboot is required to get Rosetta restarted.