Am I really imagining multiple undos in GC? I must be going crazy. I'll have to fire up my 8600 to find out the truth. What's revert, Krypton?
Oh, on a related note, even if I'm wrong about Undo, GC 5.1 presented another terrifically strange, fatal bug. Listen to this: I saved a pic file, closed it, and then went back to do some more editing. The file as displayed was completely damaged, with huge non-geometric portions of it missing, as if someone took the eraser tool and blindly clicked in the center of it. This was cured when I tried the newer version. Unfortunately, the Apple Bundle license seems only to apply to that particular version; the new version does not recognize it! Oh me oh my.