When you drag across the search field in the Web Inspector, instead of selecting text it drags the inspector window along.
<rdar://problem/4887419> REGRESSION (SearchField): Dragging to select in the Web Inspector's search fields drags the inspector window (11847)
Created attachment 13100 [details] Add the search field to the undraggable dashboard region
Comment on attachment 13100 [details] Add the search field to the undraggable dashboard region r=me
Landed in r19554.