Apple released the latest beta of iOS 5 and iOS 4.3.5 recently. Both of them turned out to be jailbreak friendly, but the procedure involved pointing Redsn0w to the last firmware to get the jailbreak done. iOS 5 beta 6 can be jailbroken using the same method, however, it’s a tethered jailbreak. The same goes with iOS 4.3.5, point to the iOS 4.3.4 ipsw and get your device jailbroken.
Luckily, the iPhone-dev team has released an upgrade for Redsn0w, which doesn’t require you to point to any previous firmware files. It’s still a tethered jailbreak, which would require you to connect your iDevice to the computer and boot using Redsn0w. Looks like there isn’t going to be any untethered jailbreak coming our way until iOS 5 is officially released an out of beta. The team also seem to have fixed a certain error with the CDMA iPhones that occurred after jailbreak. They explain;
Apple updated the iPad1 iOS5b6 IPSW without changing its version number or filename, so we’re releasing redsn0w 0.9.8b7 to handle both the original and changed IPSW. We’ve also added explicit support for a tethered 4.3.5/4.2.10 jailbreak (instead of pointing at the 4.3.4/4.2.9 IPSWs) and fixed a 4.2.10 problem.
The latest version, Redsn0w 0.9.8b7 can be downloaded from here for both Mac and Windows.