When some text is not found, the "Search for" field has the red rectangle drawn BEHIND the text box, and the text is becoming white on white, effectively unreadable.
What version, platform, theme?
1.22, default Adwaita theme in Fedora 18.
This is a bug of the Adwaita theme. It uses the pixbuf engine and defines a background image on the entry, which isn't overridden when we try to override the background of the widget -- but our override of the foreground still takes effect, resulting in white on white.
We cannot do anything about this unless we stop changing the widget's color; but it's definitely not our fault if the theme engine doesn't follow the background override.
Duplicate of 3575449 https://sourceforge.net/tracker/?func=detail&aid=3575449&group_id=153444&atid=787791