Benetton Treviso bagged their first point of the PRO12 season but they couldn't make it four as Craig Ronaldson's boot edged Connacht to a 9-6 victory.
De Kock Steenkamp has been ruled out of action until 2015 after seeing a specialist for his Achilles tendon injury which, fortunately, won't require surgery.
Leinster captain Jamie Heaslip admits they won't be celebrating a third straight title in May if last Saturday's performance becomes a habit this Pro12 season.
Ulster revealed that Neil Doak has been appointed as the Irish province's new head coach, with immediate effect, until at least 2017.
De Kock Steenkamp will see specialists this week to discover the extent of an Achilles injury sustained in training for the Ospreys.
Two tries from Tommy Seymour were the highlight as Glasgow Warriors returned to the top of the PRO12 table with a 40-23 victory over Treviso in Italy.
Ospreys made it five wins from five games so far in the Pro12, as they picked up a less than comfortable victory over second-bottom Zebre.
Sean O'Brien will miss Ireland's November internationals and possibly the Six Nations as well, after being ruled out for up to six months.
PREVIEW: Glasgow Warriors coach Gregor Townsend urged his players to ensure the defensive frailties that almost cost them against Connacht.