I randomly jump from Windows XP Pro to Linux Mint 6. Generally I find that if you adhere to the proper web design standards eg make sure everything is validated properly, there is really no need to check your work in every available browser. But saying that... you should check anyway. Never even considered doing it, but if your concerned, try installing internet explorer in wine (I think I saw it already installed tho).
In XP at the mo.
“The best thing about a boolean is even if you are wrong, you are only off by a bit.”