Scenario - Our office
Mac OSX 10.4 running Vectorworks 10 and Vectorworks 12 - Fundamentals Only. Running both because old projects are in 10 and new ones in 12 (we missed the 11 update all together)
20 users - G4's & G5's all with 1+ GB of ram.
Crashes/Freezes - Vectorworks 12 just crashes, freezes, becomes unresponsive. Force Quit is the only option. No rhyme or reason we can put our finger on. (Please note - we are not using 10 and 12 at the same time, only one program is open at a time).
Corruption - You save a file and when you go to reopen it it says it is corrupt. Autosave feature saves 0k files, manual save sometimes saves a 0k file. Sometimes files mysteriously go from 5000k to 20k, of course it is now corrupt, too.
These files are all ones that we converted (10 to 12) BUT have worked just fine for a period of time. Some of the files we converted 10 to 12 are still just fine and dandy.