Warning: might be slightly spoiler-ish if you haven't done this quest line yet.

In any case I finished all of it, i'm standing right in front of the forge, press E. But the screen that pops up is empty?

I can't forge anything...

http://img23.imageshack.us/img23/5264/2013061300001a.jpg (couldn't post image since stupid forum wouldn't allow me to)

is this a known bug? Any fixes for it?

since your a pc user. use console commands to finnish the quest then spawn an atherium item. shield, staff or crown.

Did you already craft something with it?