i have a feeling if you log back in with your old id it might work again. Atleast your glitch is only with you and not several hundred.. It also might be your user table is corrupt in the database so i'll run a repair soon..
On a similar theme, I am registered twice with different ID's. I would like to delete one of the ID's (not sure which, yet) simply to clean things up a bit if for no other reason.
And, on the note of cleaning things up, it would be nice to be able to delete posts of "For Sale" and Want to Buy" items once that need's been fulfilled. Other forums allow for deletion of out-of-date ads, but I can't find how to do it here.