As most of you know, Apple released an update to iOS last week, bringing the firmware to 5.1.1. The new software doesn't contain much more than bug fixes, but if you updated to it, you'll want to save your SHSH blobs.
Luckily you can do that with the latest version of TinyUmbrella. NotCom has just released TU 5.11.00 with support for the latest version of iOS. And if you haven't been saving your SHSH blobs, you might want to start...