Can't attach pictures

[EvolutionRevolution]

When I try to attach a picture, I get the "uploading picture" pop-up, the page reloads as usual, but the picture isn't actually uploaded (it doesn't show up below my post and there isn't a dropdown box allowing me to insert the picture in my post). It worked fine up to 2-3 weeks ago, when I last uploaded a picture.

Edit: Nevermind, I missed the (rather inconspicious) message that the file was too big...