Alrik, try ImageShack. There you can upload a Screenshot without Problems. It`s easy to use, but if you like you can ask me via PM. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
If you do host it on imagehack though, remember to just copy the directlink to the photo (think it's the one furthest below), and then write the url-commands manually. Imagehack is a common host on another forum, and for some weird reason I allmost allways get spyware when I click on one of those links <img src="/ubbthreads/images/graemlins/suspicion.gif" alt="" />. The thing with the spywarelinks is that they go to the picture on imagehack, and not to the acual picture.
I've had no problems hosting myself there though <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />.