This is happening a lot with #humblebundle -- the purchase happens, the download page appears, and it's empty. After a random amount of time and page reloads, the downloads finally appear. Equally, the same thing happens on the Your Purchases page where the entire bundle doesn't show up.

I'm assuming this is due to a slow backend SQL query that's timing out before it's finished rather than an actual data issue, but is it ever annoying...