What's wrong with this picture?

My favorite part of a newspaper used to be the funnies.  I don't read them anymore because I've grown into a mature and serious adult {ahem, well, yes}.

But back when I was immature and not overflowing with wisdom, I loved to play the puzzles on the back page.  I especially liked the one where they show you two "identical" pictures and you have to find the differences.  I have provided one below for your viewing pleasure.

This morning I was preoccupied when making my bed.  Can you tell how?  The two pictures below are not identical.  I repeat: not identical.  Can you find the difference?

If you think you spot it, post it in the comment section.