Quote:
A note about the Quest Point Cape:
Now that we've just released a new quest, all the players who'd got the new QP cape or hood will find that they've no longer got the right to wear these items since they haven't got all the available quest points. If you were wearing the QP cape or hood when you logged off before the update, the items will try to take themselves off you when you log back in.
If there was not sufficient space in your inventory or bank for the items to appear, you will be able to retrieve them from the Wise Old Man of Draynor Village free of charge. You will be able to wear them again as soon as you have the maximum possible number of quest points.
Extract from RuneScape.com News item. Rather self explanatory. Read the news please?