Chronic Dev Team has released a new version of Greenpois0n, Greenpois0n RC 6.1 which includes the fix for famous iBook issue for jailbreak iPhone, iPod Touch & iPad. For those unaware of what is the iBook issue, Apple has got smart & started detecting jailbroken iPhone and prevented users from accessing iBook iPhone app even though you have bought books legitimately .
It was just matter of time for iPhone hackers to identify & make workaround for this issue. Greenpois0n rc6.1 addresses iBook issue. Simpley run over your jailbroken iPhone 4, 3GS & iPod Touch 3G & 4G.