How do you folks handle browser testing?
On several occasions I've had colleagues report that a module won't load properly. This is invariably an Internet Explorer issue, but even when testing in my own IE (currently 8, as we're stuck on Windows XP at the moment in my organisation) I've found no issues.
I'm looking for a tool I can use to test across browsers; the only ones I've found so far either just generate an image (which is no use), or don't work properly because the user has to go through the University authentication first.
Also on a side note, where do you draw the line with browser compatibility? If something won't work in IE6 or older, is this acceptable?