Defending champions Ulster went to the top of the Magners League last night after beating the Ospreys 43-7 at Ravenhill.
There were tries for Rory Best, Tommy Bowe, Paul Steinmetz and Neil Mcmillan completing the bonus-point haul, with fly-half David Humphreys kicking another 23 points.
A late Mark McHugh penalty gave Connacht a 22-22 draw against Edinburgh at the Sportsground.
McHugh kicked five penalties altogether and converted Matt Mostyn's first half try in a game that saw no less than five sin-binnings in the final half hour.
Chris Paterson scored all but 3 of the visitor's points.
Elsewhere, Cardiff beat Glasgow 27-9 and the Borders lost 8-20 to the Dragons.
Leinster can keep Ulster on top of the table if they manage to beat the Llanelli Scarlets this evening.
Trevor Hogan and Guy Easterby return to the Leinster XV for the trip to Stradey Park.
Captain Simon Easterby reverts to the blindside for Llanelli alongside Alex Popham and Gavin Thomas, with Mark Jones coming in on the wing for top try-scorer Darren Daniel.
Dwayne Peel is on at nine inside Stephen Jones, with Regan King back in the centre.
Kick off is at 5.30pm.