Just the links from the summary pages are missing. Once in Y! message board, just go to top of page; see that box with Get Message Board For:; type TBT into that box; then hit enter. Should work. Worked yesterday.
Y! technical incompetence strikes again. Between screwing the message boards and having their partners hack into their clients email accounts, I'm starting to wonder if the IT department in revolve over losing their work at home privileges.