Gentlemen, Google puts the item searched for in the <title>
$ GET http://www.google.com.tw/search?q=bg4wip | perl -nwe 's/.*(<title>)/$1/&&print'
<title>bg4wip - Google</title>
Why of course, how else could one pick different searches out of their browser's history?
Now we turn to MediaWiki. It's just the same
<title>Search results SITENAME<title>, no matter what string you search for.
Version: 1.12.x
Severity: enhancement