As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE TOILET CAUTION LIGHT ILLUMINATED A FEW MINUTES AFTER TAKEOFF. FA REPORTED LIGHT MIST IN THE CABIN AND PAX IN ROW 11 REPORTED SMOKE NEAR THEIR FEET. PERFORMED EMERGENCY CHECKLIST AND RETURNED TO MSP. AC WAS NOT DEICED PRIOR TO TAKEOFF COULD NOT DUPLICATE ON GROUND. TEST FLIGHT REQUIRED WITH NEW POM PROCEDURES. TEST FLIGHT SATISFACTORY PER CREW NEW TAKEOFF PROCEDURE: CRJ-200 BULLETIN (POM) 09-04. COMPLETED WALK AROUND OF AIRCRAFT. RELEASED FOR REVENUE.