They get fixed then they break again, it's very annoying.
I tend to use google whenever I need to search wordpres:
google.com/search?q=my search query site:wordpress.org
Or for the codex:
google.com/search?q=my search query site:codex.wordpress.org
I know WP has some partnership with Yahoo (and bloody hell, that's great, I'm really pleased to see it succeeding like that!) but they could really use a better search function, the current breaks from time to time, and doesn't return very helpful results, if it returns any at all!
I'm all for google, or at least a bit of choice!