Since I have building sites, I more often than not run my creations through browsershots.org to see how they look on multiple browsers. Browser Shots presents to you a screen capture of how your site will look on dozens and dozens of different browser and operating system combinations.
It’s a very handy tool. I am using it myself right now to troubleshoot this very site! As you will see from the capture below, this site looks right in most browsers, most except all variants of Internet Explorer of course!