Experimental search under experiments?

Google's shortcut search experiment seems to be under maintenance or something, 'cause it ain't working as it is supposed to.

A few weeks ago, I released a Firefox search plugin to trigger it from the search bar, and today I discovered that the shortcuts are not working as expected: keyboard keys J and K are used to navigate forth and back in a search result page, but now it seems that pressing these keys will go forward a complete result page, and not browsing through individual results.

Does anybody know what is happening?

Update! (23/08/2008, 16:04) Looks like it's fixed, don't know for how long.