As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 2000 FT GOT `SMOKE TOILET` EICAS MESSAGE AND DID AIR RETURN TO MSP. FLIGHT 3272 RETURNED TO MSP AFTER DEPARTURE DUE TO A LAVATORY SMOKE DETECTOR WARNING. THE CREW CALLED AFTER LANDING AND ACTUALLY SAID IT WAS A LAV SMOKE MESSAGE THAT WAS DISPLAYED RT AFTER T.O. THE CREW STAYED IN PATTERN, DECLARED AN EMERGENCY AND RETURNED TO MSP WITHOUT INCIDENCE. F/A VERIFIED NO SMOKE. REPLACED DETECTOR. (K)