Oh good... Potter possibly opening the weekend of my birthday.. how magical & wizard-like.. :wacko:
So my friend who is a Potter nerd & does artwork stuff for a living (painting, photo-shop, sculpting, prop building etc..) pointed out that the USH artwork has a flaw on it. Hogsmeade in the artwork is Orlando's Hogsmeade (which not really a big deal but.. still). The thing he pointed out was the Hogwarts flaw. When they enlarged the castle to make it a big focal point, they didn't erase the rest of the castle from above Hogsmeade. So the observatory appears twice.
Not really a big deal & not noticeable to most (everyone), but thought it was amusing enough to share.