Help! Wilma is missing!

Well I dunno what I've done - I was going to change Wilma's image in the top corner (gone) with Mr Potatohead below, but Mr P's image is too big, and I couldn't be bothered reducing him in size, so I left Wilma as is.

But now she's gone! I've gone & taken the URL out & put it back in & she appears in my profile... but not on the blog.

Any ideas?