Im using IPad2 WIFI (old one) and it was iOS 4.3.3 jailbroken. I always wanted to upgrade my iPad2 to iOS5.
With redsn0w 0.9.11b4 for window, i have succesfully upgraded my ipad to iOS 5.0.1.

First of all, I upgraded iOS 4.3.3 to 5.1.1 and then i just followed the order from redsn0w.

There was no error at all.
Once iPad2 got back to iOS 5.0.1, I jailbraked it with redsn0w.

4.3.3 -> 5.1.1 -> 5.0.1 -> jailbreak 5.0.1

Everything was done in less then 10 min.

Thank you for the great work.

I just read Jacques Holst's comment so it is possible. Right?

Always thank you for the great work!

I have a question. I have iPad2 wi-fi 4.3.3 jailbroken and Ive been saving shsh blobs with TU.
I know that I can't upgrade my iPad2 to 5.0.1, which is able to jailbreak.
Is it possible to upgrade my iPad2 to 5.1 and downgrade it to 5.0.1 with this version of redsn0w and jailbreak it?