Okay, silly mistake, I was trying to use su instead of the normal user, which I thought wouldn't be a problem for permissions, but it was. Anyway, ran gallerybugx and it ran fine, however I also noticed that my camera wasn't working and the SIM card wasn't recognised. Rebooted the phone and SIM and camera are now working, and taking a photo restored my gallery. Still no contacts or messages though I have a backup of the contacts, but not the messages. I guess they're lost at this stage, or does anyone have a suggestion?

Thanks!