At the recommendation of a developer working for a client of mine (thanks Colin!) I have finally downloaded the Beta of Apple's browser, Safari 3, for Windows. It's pretty good actually. And as he was telling me, if you work to Safari when theming your site it seems to work in almost anything else. Which is a handy trait.
I'm going to give it a go for a month or two and see what happens. It may well become my browser of choice if it makes CSS development less painful!