[Merv Burger]

You don't have to make websites compatable with Avant Browser, last I recalled. Avant, just like Maxathon and many others, use the IE rendering engine. So, if it looks fine in IE, it should look the same in Avant and all browsers that use the IE rendering engine.

And you don't have to really do compatability for Netscape, either. They use the Mozilla/Geko engine.

For the Warlocks, I, at the very least, make sure it works in IE and Firefox for Windows. The only known problem I have found is with Internet Explorer:mac, which just completely renders it wrong. Although, I think, why use IE:mac? There's Safari right pre-installed on Macs.