Just a heads up, dev team released a bug fix for redsn0w for both the mac and pc. This should fix the ppc crashing issues people with ppc macs were having and has some small bugfixes. If you have already jailbroken with an earlier version there is no reason to re-jailbreak; this is for people that were having problems and for new jailbreaks.

Download the new release here: http://g.appleguru.org/