Neither the analysis boards nor the games themselves are allowing me to castle in any of my current matches.  Any ideas why?

None, you might want to contact Chess.com, Help and Support and let them know so they can look at it for you.  Some thing were affected durning their last update of chess.com.

Terry

Thanks - I don't need to castle immediately, so I'll file a ticket if staff (or similarly affected people) don't respond to this in a day or so.

Edit:  Problem resolved.

good