Yeah, I know. There isn’t really a good way to make an image that fits all screens really well, since everyone has different screen sizes and resolutions. Additionally, I know Windows is set up to have you browse with a window taking up the width of the screen, whereas I know most people on Macs (myself included) never use a fullscreen’d browser. The image is set to the width of what I feel is a fair and standard width (roughly 1300px). The length of the image is set up to accomodate 5 quote posts (which is what the blog is set at per page) and nothing more.
I agonized over the whole thing extensively, trying to blend the image out into a solid color that I would be happy with. However, it’s mostly impossible (or, at least, more work that I can feasibly see putting into it.) But thank you for your message. :)