tstr wins. I am indeed forced to use IE6 because the key internal WTFy web app that I use all day has only been "validated" for use with IE6. The web app is basically just a GUI for launching batch jobs. Apparently if I were to use IE7 or Firefox to launch a batch job, it might produce different results.
The irony is that the web app only barely works in IE6. I regularly get trapped in multiply-nested frames, sometimes the browsing history gets deleted to that the Back button stops working, etc. It's great.