Same problem. I restored my playbook. It was previously rooted before i restored it. And now i am on the 6149 firmware, and Dingleberry won't let me downgrade. It keeps say "continue" downgrade, and then and then it says "please wait". It does that over, and over again, and it doesnt get anywhere from there! I did back up all of my data before i restored it, so i'll see if i can get it back by restoring my last file.