Following from a conversation with Patrick earlier tonight, here are some great resources for testing in different browsers. I have found xenocode to be awesome:

http://www.xenocode.com/Browsers/

Here are a couple of articles which cover similar things but are both a great read:

freelancefolder.com/7-fresh-and-simple-w...owser-compatibility/

www.sitepoint.com/blogs/2009/03/17/build...-browser-test-suite/

great resource - thanks for sharing Jen!

A similar tool is www.browsershots.org which will give you screen dumps in all the different available browsers. Advantage is that it lets you quickly see if there's some css issue throwing the site out in multiple browsers at once. Disadvantage is that it only snapshots the one page on the site.

Xenocode's advantage is that it lets you use multiple browsers to view your sites, but without having to install or switch between each.