Last month, it was found that MS had decided to give users of the Opera browser who visit MSN a different stylesheet than everyone else. The stylesheet (which decides the web page layout) was intentionally broken, and the MSN site looked bad when viewed with the Opera browser. Opera complained to Microsoft, they didn't do anything substantive, so Opera took matters into their own hands.

I haven't been able to stop laughing. I went and downloaded the bork version and it's hilarious. I'm don't normally visit MSN, but I might start now since it looks so useful.