I recently purchased a iPod Touch 3G running firmware 3.1.2, I then proceeded to jailbreak using blackra1n RC3. Needless to say it went flawlessly for the most part, and I was able to install Cydia and Rock. I loaded my Rock backup and enjoyed my nice jailbroken iPod. But, I mainly used Cydia over Rock and only used Rock for its backup abilities. Now whenever I try to run Cydia the boot screen appears and then instantly returns me to springboard. I was pissed, so I re-jailbroke. I remember how Cydia and Icy used to conflict so I installed Cydia then Rock. Still no dice. I really want to be able to use Cydia, anyone got any tips or advice?