Geohot released blackra1n RC2 to fix many issues that might come across while jailbreaking your iPhone or iPod Touch with blackra1n RC1.
Also now you can Jailbreak iPhone 2G/3G & 3GS 3.1.2 firmware and iPod Touch 1G/2G 3.1.2 firmware on Windows and Mac
What’s new in blackra1n RC2
- Fixed 3G issues
- Tethered jailbreak for 3.1 OOTB ipt 8GB and new 3GSes
- Fixed Icy issues
- Available for both Windows and Mac
Link: Download blackra1n RC2