The power search form on [[Special:Search]] has a "List redirects" checkbox, which has no attached <label> on its label text. This means clicking the label doesn't activate the checkbox, unlike the giant pile of namespace checkboxes right next to it.
This is due to [[MediaWiki:Powersearchtext]] being godawful and tossing label text in the middle of layout and such.
Version: unspecified
Severity: minor
URL: http://en.wikipedia.org/wiki/Special:Search