Sorry i must have been sleeping while awake and had a mini panic attack seeing "invalid save".
Turns out my username was wrong! I checked to find my ID from the hearthlings list and found there was an extra letter on my username, probably due to the original being taken. Good thing that list is there or i would never have managed to log on again. I think there needs to be a lost username option along with password recovery on the log in page for stupid people like me.
Boy do i feel silly, good way to introduce yourself to the community eh??
Anyway, now the bug is simply being logged off with "invalid save" message whatever that means, and losing some items during the rollback which i didnt realise happened untill i read some forum posts complaining of missing stuff. Where is that information usually placed about server roll backs etc?
Thanks for the replies