From Painless Bug Tracking @ Joel on Software:

If you don’t specify what you expected to see, I may not understand why this is a bug. The splash screen has blood on it. So what? I cut my fingers when I was coding it. What did you expect? Ah, you say that the spec required no blood! Now I understand why you consider this a bug.

This sort of stuff cracks me up, but you may need to be a software developer for it to be funny.