RedSnow 0.9.10b8b makes the zip files compatible with the Windows Explorer. However, the Mac version of Redsnow has not received any noticeable changes.
It goes without saying that we would have loved to get this update for the highly-anticipated untethered jailbreak for iOS 5.1, but still no news on that. We are hopeful, though, to get some interesting news soon since Pod2g managed to untether jailbreak his iPhone 4. We can only hope a public release wouldn’t be far off.