The way tumblr handles this is a lot nicer because you're not restricted to a tiny viewport, and you get the fullsize image. And there's no way to quickly zoom to 100% currently with FN, so the image is often blurry (or possibly at a slightly lower resolution??)
Tried searching for various Notification support topics, but this is pretty much what I was thinking.
Right now it's hard to see which notifications are for comments or what, since they get lost in a long list of follows. Having a split category would be WAY more useful (and I hope something like this is already in the works ??)
Customer support service by UserEcho