If you have recently upgraded to the latest Apple OS 3.0, all of you jailbroken apps might have stopped working, you will need to repatch the OS 3.0 with application called APPSYNC available in Cydia under the Hackulo.us repository.
How to Patch the Mobile Installation file in OS 3.0 for iPod Touch/iPhone
- Go to Cydia
- Tap on Manage tab
- Tap on sources
- Tap on “Edit” and then on “Add” , type in the hackulo.us repository which is http://cydia.hackulo.us
- Tap on Add Source
- After the source is added, go to “Search” in Cydia and search for AppSync for OS 3.0
- Install and Confirm
- Select the applications you want and click sync, they will be synced without any errors
Now you can freely sync your jailbroken apps via iTunes to your iPod Touch 1G/2G and iPhone.