Why does this work:
http://www.google.com/search?q=azure+ray+site:en.wikipedia.org&btnI=I%27m+Feeling+Lucky
And so does this:
(Note: loads YouTube video) http://www.google.com/search?q=azure+ray+rise&btnI=I%27m+Feeling+Lucky
But this doesn't:
http://www.google.com/search?q=azure+ray+rise+site:songmeanings.net&btnI=I%27m+Feeling+Lucky
Nor does this:
http://www.google.com/search?q=azure+ray+rise+songmeanings&btnI=I%27m+Feeling+Lucky
Can websites/domains disable Google's "I'm Feeling Lucky" feature? Or what?
[UPDATE]
As mentioned in the comments, when both search queries that do not work using those URLs are typed in manually on the Google homepage 'I'm Feeling Lucky' does work (note that you will have to disable Google Instant to use the button). However, when I copy the resulting Google URL (captured using Firebug) and paste that in the location bar it still doesn't work. An example full URL is: