GreenPois0n RC5_b3 for Mac Released, Fixing Major Bugs in RC5_2

Chronic Dev Team has just released GreenPois0n RC5b3 for Mac which resolves major bugs occurring in GreenPois0n RC5_2. With this Chronic Dev Team has also released the GreenPois0n RC5 for Windows which can also be used as untethered jailbreak for iPhone 4, iPhone 3GS, iPod touch 4G, iPod touch3G and iPad running on iOS 4.2.1 without SHSH blobs of iOS4.2b3.

If you were not able to download and jailbreak your iDevice with Mac, you can download GreenPois0n RC5_b3  and follow the guides given below to jailbreak your iPhone, iPad and iPod touch. Hopefully your issues are now fixed in the new release. You can also enable / disable custom boot logo with the guide here.
iPhone 4 users who want to stay with their unlock of old baseband can first use TinyUmbrella to restore to iOS 4.2.1 and then jailbreak and unlock with Ultrasn0w with the guide below. GreenPois0n Windows version is also expected to be released soon.
.

Download GreenPois0n RC5_b3 Untether Jailbreak iOS 4.2.1 for iPhone, iPad and iPod touch

Download GreenPois0n RC5_b3 for MacOSX