I've just tested the 5.0.1 signing window using iSHSH1T, and it appears closed.
If you need to restore a 5.x firmware on your iPad2 device it will now need to be restored to 5.1. iPad2 jailbreakers need to be VERY CAREFUL now not to do something which will necessitate a restore!
iPad1 owners who want to restore to a previous version of IOS must have saved SHSH Blobs for that version. See our FAQ here for more detail - http://www.ipadforums.net/ipad-hacking/59291-shsh-blobs-faq-new-improved-2012-a.html
If you need to restore a 5.x firmware on your iPad2 device it will now need to be restored to 5.1. iPad2 jailbreakers need to be VERY CAREFUL now not to do something which will necessitate a restore!
iPad1 owners who want to restore to a previous version of IOS must have saved SHSH Blobs for that version. See our FAQ here for more detail - http://www.ipadforums.net/ipad-hacking/59291-shsh-blobs-faq-new-improved-2012-a.html