I wonder why it's too big? I opened it in Paint Shop Pro, and it is just 100 X 100 but when you right click on it it says it's 104 x104...weird. See if it comes back any different....
hmm, maybe it's the attachment sizer thingy that's making it too big, maybe it needs to be uploaded and then linked to.....
Here's the same exact image, but it's linked from my page....
I hope one of them works for you, I love the snow theme!