Yeah! My iPhone 4 crashed completely after using JailbreakMe.com and installing BiteSMS.. More precise, I recieved a message and when I choosed to read the message from the Lock Screen my iPhone ended up restarting itself but never getting past the silver Apple logo so I had to put it in DFU mode and Restore it.. But my iPhone always freaks out after being Jailbroken for a few days so I'm just gonna have to settle with stock and wait for iOS 5.. -.-
@Rui Fonseca,
If you have iBooks greater than version 1.2.2 and have an Apple purchased iBook (with DRM) it will crash on a JailbreakMe jailbroken device. You'll need to open the DRM book and wait up to a minute, but it will consistently crash.
Reinstalling, fixing permissions, resync, hard reboot, rejailbreaking, nothing works except reverting back to 1.2.2 (or restoring and losing the jailbreak)
I had an issue with Sbsettings , all icons were messed up, had to unistall then reinstall... Now everything works fine, iBooks as well !! Thanks Comex !!!