I was made aware that BetterSearch is currently not working on Google. Apparently, Google changed the HTML of the results page, and BetterSearch doesn’t know what to do.
I’ll release 1.22 soon. Stay tuned.
Update 2008-08-22: I’ve just uploaded v1.22 to the Mozilla addon site; once it’s been reviewed by the staff there, it should show up here.
Update 2008-08-24: v1.22 was reviewed and approved!