Hi,

I recently bought the humble bundle at http://www.wolfire.com/humble but I was having issues getting Penumbra to run on my Linux machine. I saw that installing the latest Linux patch was recommended.

Having done so, I now only get a box saying "Enter Serial Number Below". I don't have a Serial Number. What should I do?

You do not need any patch for the bundle, so if it said that some where with the humble bundle installer then that is a mistake!