A Better Finder Rename 8.78 Civilization IV MacUpdate Desktop 5.0.8 DVDRemaster Pro 7.0.1 Parallels Desktop 6.0.11994.637263 1Password 3.5.9 Mac DVDRipper Pro 2.1 Divvy 1.2.3 (first 10,000 purchases only - they're at > 5,000 now) Hands Off! 1.1.2 App Tamer 1.0.5 TechTool Pro 5.0.7
Civ IV and TechTools are a seperate download (they're pretty big files but not unmanageable).
Perhaps it left some trace behind when it was removed. Check out the hardware section of the registry for entries regarding drives. It sounds strange enough that you might not be able to find anything online to provide a lot of help.