At some point recently, the built-in help seems to have disappeared on my copy of Mathematica. When I try to use it, the help window has a message like "Your search - GraphLayout - in Documentation Center did not match any documents."
I think this started after I loaded some module with >> recently, but I forget which one it was.
Any ideas on how to resolve this? (Ideally without nuking all my options with a reset, but if I have to, so be it.)