Google seems to do UX sniffing with it's search page, and with Beta 25 it loads the old fashioned version of Google with limited features.

Before you moan at me, I'm only reporting this really to see if anyone else is affected by this, or if it's something my end. And also because, well, it's Google and it's kind of important to have it working! :p I've cleared cookies and cache.
If this is an issue for others, I'll flag it up in the Google feedback/reporting issues forum.
-Stephen