MuscleNerd from the Dev-Team sent out the following tweet this morning:
"Apple will fix this bug very quickly. Run FW Umbrella http://is.gd/dYkKl now so you can use jailbreakme.com forever."
In short, it's an update to The Firmware Umbrella's TinyUmbrella that "support[s] the new 3G & iPod Touch 2G SHSH requirements that iTunes 9.2 imposes on firmware 4.0 and above."
Always nice to see the jailbreak community working together…
Use our guide on how to use FW Umbrella (not guide talks about spirit jailbreak, but it applies to any type of jailbreak)