Sn0wbreeze 2.9.1 has already been released by iH8sn0w and, according to reports, the updated download link now fixes a number of bugs on the iPhone 4 and the 3GS, the iPad Touch 3G and 4G and the iPad 1.
The biggest advantage of this tool, apart from its astonishing feature wherein you can jailbreak older devices on any version between iOS 3.0.0 - iOS 5.0.1, it is mainly used to preserve basebands. The previous version - 2.9 - had some minor bug issue and was creating problems for iPhone 3G users who tried to access their basebands using the program. The new 2.9.1 version deals with all existing problems and fixes any such bug issues.
The developer has also stated that the problems concerning iPad baseband's flash problem and a few PAM (Pluggable Authentication Modules) issues have been fixed.
(Information from Pwnage Tool)