CARDIFF BLUES ended a run of five successive defeats in the Pro12 and handed Ulster a first loss in 2014 after winning a nail-biting encounter 28-23 at the Arms Park.
The faultless kicking of fly-half Gareth Davies contributed 23 points, with the Welsh try coming from Munster-bound No 8 Robin Copeland.
Ulster had a try from full-back Dan Fish, while out-half Paddy Jackson kicked six penalties.
NO ACTION ON BITING INCIDENT
The biting incident reported by Leicester hooker Tom Youngs in Saturday's 22-16 Premiership victory over Northampton has escaped a citing.
The English RFU confirmed that citing officer Wade Dooley has reviewed the match footage and opted against taking action.
Youngs appeared to suggest England team-mate Dylan Hartley was responsible for the bite and Northampton director of rugby Jim Mallinder later stated he would speak to his club captain.
The lack of evidence to support Youngs' claim and absence of any complaint from Leicester have forced Dooley's decision.