I just spent the last week (on and off again) working on a map that I am pretty proud of. When I go to upload the map/images to my file share I get a message saying that "the creator is not allowed on xbox live". I am allowed on xbox live though, and have never been banned or done anything wrong that I know of. Does anybody know a solution to this problem???
Your gamertag contains a term that is blocked by Micro$oft's user-created content filter. Until you change your gamertag (and then edit the file), you will not be able to upload the file. I'm guessing that Micro$oft is blocking "nasty". They're not blocking "fat", because Fat Kid variants are still able to be uploaded (sadly). You need to change your gamertag. There is no other fix.