I've run into this a couple of times myself, and it seems to have something to do with the fact that the search results appear in an iframe. (The search on dev.day.com uses Google's custom search engine.)
In case you run into it again, I suggest loading the search directly:
http://www.google.com/cse?q=&cx=001066344910423680250:pzsvhhkbdyw&rurl=http://dev.day.com/content/dd...
(Without JavaScript - just in case) http://www.google.com/cse?q=&cx=001066344910423680250:pzsvhhkbdyw&rurl=http://dev.day.com/content/dd...
Alternatively, you could add the search to your browser's search engines, which enables you to search directly from the search (or address/omni) box. If your browser supports this, just right-click in the search field on dev.day.com and you should see an option like "Add as search engine" or "Add keyword for this search".