Hi!
Yes, there was an issue with the server but I fixed it. Twice. :) Not sure exactly what had happened, but there was a data inconsistency in the map.
Oh, and again: if you try to upgrade a second image in the same directory (thus sharing the "sm" dir) Squeak will start blabbering about what new classes to use etc when trying to load the ImageSegment. Just alt-. out of there and do:
SMSqueakMap bootStrap
...and it should work fine.
regards, Göran