I don't mean to butt in, but is this still in use for general images? I still have a 17" which I usually run in 1152x864. While signature pics are usually small anyway, it's those 2048x1536, 479kb JPEG files which are the nasty ones. Not saying anything about anyone who might decide to post a BMP file (Firefox displays nothing but still downloads the 3.5MB file!). If it has to be big, people should post a thumbnail of the image with a link, such as imageshack.us has.
One other slightly annoying thing on my mind, is quote pyramids. It's kind of dumb seeing someone quoting the post right above them, then another person, or ten, quoting each post above them with all of the quotes in cascading boxes; that includes quoting posts with large images. The quote option should only be used if the post is dead and buried (e.g. on the next page), and then edited for just the sentence of use - we don't need an encyclopedia!
Not To Mention Those People Who Still Type In This Particular Way Which Makes Me Read It Like A Grade 3 School Kid.
My paragraphs are long and boring, and I do have a tendency to throw everything into one paragraph, so I'm also not perfect!