Website for compatibility testing.. :)

BrowserShots.org (http://www.browsershots.org).

Want to know what your page looks like on another browser? Want to know what your page looks like on another 46 browsers? Pass the address to BrowserShots, wait a while, and you’ll get to see the page on (as of this writing) up to 47 different browsers. (Admittedly, this begs the question as to why there are 47 different browsers, but I digress.) It’s a free and popular service, so there is a queue. Submit your page, go off and do something else.