If you discover that your function keys (such as F2 and F8) do not work inside of your guest OS but they do on your real system. Check your Function Lock and make sure it's enabled when you are in the guest OS.
Hi, alone this information doesn't really merit a document, but if part of a compilation of such tips & tricks, it could be very useful. I would like to encourage you to put something together like that, and we can help highlight it on the site. Or you can collaborate with others to create such a document (or plop it into an existing document). How about it?