Since we develop Windows applications at work, its now starting to become more common for clients to be running Vista. We found our first compatibility issue last week - performing ICMP pings that worked on XP nolonger worked - the API actually failed.
One of the quickest ways to find problems, is for the development enviroment to be moved from XP to Vista. So relunctantly, I am seting up a Vista Business virtual machine for this purpose.
I was quite suprised, however to discover that my Bed's Printer Switcher application works perfectly in it. I was impressed to discover that OSX did this all for me - I don't know if Vista does (it bloody well SHOULD), but if it doesn't at least that will work without fiddling.