Notcom has released TinyUmbrella 5.10.15 for Windows and Mac which includes minor bug fixes, especially for original iPad 1 users, as they experience errors while trying to save SHSH blobs using any previous version of TinyUmbrella tool.
Download TinyUmbrella 5.10.15 for Mac
Download TinyUmbrella 5.10.15 for Windows
Download iOS 5.1.1 for iPhone, iPod Touch and iPad
How to Save SHSH Blobs with TinyUmbrella
How to Save SHSH Blobs with iFaith