Yet more proof that Bethesda didn't really test Skyrim

Oh dear this is one that really should have been picked up. Within Skyrim are seven special stealable items called "larceny targets". Pick them up and sell them to a thief called Delvin for money and to decorate the Guild Master's desk.
Trouble is once you acquire the seventh the quest marks itself as complete and the option to sell to Delvin is removed.