First person to spot the goof gets a prize!!! Email me!
Ok is it the cloth underneath the clock and lamp? I see it in the first panel but not the second panel. ^-^
That wasn't the one I was thinking of, but send me your address and I'll send you a prize because you are very observant!
It's totally a music notation thing isn't it. There's no way I'll be able to figure this out :P
You guys, it's so obvious! It's not hard at all!