These have probably been noticed by somebody, but in case not, there's a few issues I've immediately noticed upon the upgrade:
1) The inline linking to other wikis on meta: no longer works, so instead of [[en:blah]] showing up as a link to en.wikipedia.org/wiki/blah, it shows up at the top of the page as the "English" link amongst the interwiki links.
2) The "retreived from" printed-version footer is generated for all pages, not just printed versions.
That's it for now I think. =]
-Mark