iPhone only: Those of us with unlocked iPhones don't always have the best luck with push notifications. Push Doctor is a new solution that provides the genuine activation certificates your phone needs for push to work properly.
To get this solution, you'll need to add its source:
...to Cydia. Then do a search for Push Doctor to locate the package, install and confirm. From weblog Addictive Tips:
Once the package is installed, you're done. It won't show up as any app on your springboard or under the Settings app. What this package does is simply adding the valid, unique certificates for your hacktivated iPhone. Try any application with push notification support to ensure working of the package.
You can use Push Doctor on any unlocked iPhone running firmware 3.1.3 or 3.1.2.
[via Addictive Tips]