Cutting a long story short, I've done a lot of restoring of Nandroids today while trying to trace a minor problem and what caused it. Can any harm be caused by restoring several Nandroid backups in a short space of time? Can it bloat the internal memory or SD card? My internal memory has remained exactly the same. However, I think I may have lost a bit of space on my SD card. I could just be paranoid and imagining that though! Cheers.