Before doing anything on a server make sure you have a valid backup. I had an issue with PHP and I thought the issue was with Postgresql. I started tweaking with the database settings and made a mistake somewhere along the way which cleared out the entire database server. All users accounts, everything, gone.
The backups I was making turned out to be worthless and therefore my only backup was prior to the server move. I imported those posts and then used google reader to find my other posts.
The site is going to have some glitches for a little while. I am still tweaking with everything, so please let me know if you find anything wrong.
