@ Alex: I know I still owe you that report and my workaround re: UAC, I've been under cover for the past few days, but will write some in the clean install thread or elsewhere.
Anyway, this definitely looks like what I encountered after installing—and starting the campagin—anew. Crashing after EVERY level.
My suspicion was that Eufloria was not able to write stats/prefs, since also my prefs were set back to factory defaults. I copied both to that other folder (sorry, right now no access to my Windows, but probably later in the day) and then everything worked fine except for the achievements. Guess I need an empty achievements file to copy into that same folder ...