I am having the same issue; I saw on some post that this is a memory space issue but I still have 2GB left.
I am so tired of this device with the iOS black vial, if you don’t want to use this device exactly as Apple wants you to you might as well toss it in the garbage. I have 80 apps waiting for update because I have not used my IPAD in awhile because I find my Android phone much easier to use. Now I try to"Update All" and I get a wonderful useful message "Update Required" "This app requires iOS 5.0". Thanks a lot which one of the 80 apps is this error from?
So tired of this device; For Christmas we got some I-tune gift cards. That was fun trying to figure out where/how to register them; because the links and directions on the card do not match the very lame web-site. I-tunes is one of the worst web-sites out there. And if Apple is listening ("which I know they aren’t; they never listen to user we do not know what we want") Makeup your mind is it going to be called I-Tunes, I-store, I-tunes-store. And then update your documents to match!
Sorry started ranting……..