To support developer release iOS 5.1 beta 3, TinyUmbrella is updated to version 5.10.06 which also works for iOS 5.1 beta 2 and includes some fixes found in its previous release. According to official blog post:

Check also:
How to Save SHSH Blobs

“TinyUmbrella just got a small bugfix (hopefully I didn’t introduce even more bugs in this old codebase). There was a nasty UI locking issue when you clicked ‘Save SHSH’. I’ve partially fixed it. But now there’s flicker in the saved shshs window.”

Those who are not familiar with TinyUmbrella, this tool works to save SHSH blob for iDevices including iPhone, iPod Touch, iPad and Apple TV from Apple Server and Cydia which are required to downgrade iDevice firmware to an older version.

Download TinyUmbrella 5.10.06 for Windows
Download TinyUmbrella 5.10.06 for Mac