Yesterday Cydia crashed while I was viewing the info page for circuitous. It was downloading the release and when it reloaded the data, it crashed. So I thought, ok so I was doing too much for the iPad to handle at one time. I replayed Cydia, and ALL OF THE SOURCES ARE GONE! All of my installed stuff is still on the iPad but Cydia doesn't show it. I have tried deleting the releases and that worked for 5 minutes but it did it again. So, being my usual not thinking ahead self, I did a restore with iTunes and rejailbroke with redsnow. But I opened Cydia for the first time and it is doing the same thing! Someone help! I have lost all my jailbreak stuff and the iPad is very boring without jailbreak tweaks!

Google your problem - I had a similar problem cant remember exactly what I did. I did find my solution through Google though. good luck

I figured out that I did a restored from a backup of my iPad in iTunes, but then I restored as a new iPad and rejailbroke and it works.