Downloaded and installed Prevx Facebook. The install was strange as it sort of popped-up as though it hadn't installed. I thought it was a portable .exe and started wondering whether I needed to add it to the start menu. Anyway, a subsequent reboot confirmed it was installed and running. I then found out that it didn't work with FF4. Amazed! How long has FF4 been on the way? Decided to uninstall it but couldn't find an entry in add/remove programmes. Nothing in Sart/All Programs, either. Fortunately, I use ERUNT so went back to yesterday's registry, rebooted and deleted prevx.exe. Not a good experience.