So, it turns out I was wrong about Microsoft's IE8 standards-mode rendering switch - they're proposing that web authors use either a meta element or an HTTP header as an opt-in.
My initial gut reaction: wow, that sucks.
( cut because it's web-geeky and looong )So: flip the default around, and this is a good idea. Otherwise, it sucks.
Finally, a word from the lemurs.