The navigation on the left of the page disappears with such large photos and it makes it difficult to get around the site. The optimum maximum size for posting photos in posts is 560 pixels wide. Anything larger, pushes the left navigation bar off the page entirely.
You may also place the photos in your gallery and then in your post by using the BB code text that is displayed below the image when you view it at full size.
uhhhhh, you going to start with that bb code? Im sure it isn't difficult not sure why I steer clear of it.