"Ubuntu" actually means "eats your config files"
The Dapper-to-Edgy upgrade was surprisingly smooth, once I figured out how to do it. Unfortunately, the new version overwrote my “/boot/grub/menu.lst” so I could not boot Windows. I have enough experience with Linux that this was a five-minute fix, but it could be pretty scary for an inexperienced person. Who knows what else got over-written and I just didn’t realize it. I was further disappointed to find out that the version of PIDA in Edgy is broken.