This is a pretty cool service the I came across the other day. It will take screenshots of a website for from a whole list of browsers, including a lot of the older versions of Internet Explorer and Firefox. It is a neat way to get a snapshot of what your website looks like on other browsers without having to test it yourself. However it will give you no indication of what is wrong with your code if the screenshots show errors.

http://browsershots.org

Here are screenshots of this website and they look pretty good even all the way back to IE5.5.
http://browsershots.org/http://www.finefrog.com/