Yea always happens to me - very often actually but i find it absolutely fine. Use FF and i have absolutely no idea what resolution this is but i reckon the screen is 1280x1024 (although i don't use FF to full screen). Usually happeneds with big photos but can't think of where i can get a screen cap just yet. It would be a great idea if all photos that were x800+ were resized automatically on the board when you post them- never knew it was possible!
Scroll bars for the big photos are meant to be like that although I will see if i can get it so they are resized. This thread is meant for the issue where you have to scroll to read a reply because it contains a quote in the post.