Munster beat Benetton Treviso 14-3 to maintain their 100% home record in this season's RaboDirect PRO12 and climb back into second place in the standings.
Fijian wing Aisea Natoga crossed for a hat-trick of tries as the Ospreys claimed a crucial bonus-point victory over Cardiff Blues in their quest for a RaboDirect Pro12 play-off spot.
Sale Sharks are the latest team to become active in the new transfer window, with the announcement of signing Scotland international scrum-half Chris Cusiter.
Wales captain Sam Warburton and prop Gethin Jenkins are among 10 players who will be released to their regional teams for RaboDirect PRO12 action later this week.
Newport Gwent Dragons Chief executive Gareth Davies has admitted that should the Welsh regions fail to reach an agreement with the Welsh Rugby Union about next year, the four sides could join the Aviva Premiership.
Ireland and Lions second-row Paul O’Connell has signed a new two-year deal with the IRFU to stay in Munster until at least June 2016; rejecting the lure of a move to France.
Former Cardiff Coach Dai Young believes that the Welsh Rugby Chiefs and the four regional teams will put politics aside and broker a resolution to their bitter feud.
Ulster avoided two successive defeats to Irish rivals by becoming only the third side to get the better of RaboDirect PRO12 leaders Munster this season as they bagged a vital victory to move back into the top four
Wales lock Ian Evans scored the only try of an intriguing west Wales derby at Par y Scarlets as the Ospreys rose to second in the RaboDirect PRO12 table.