Ah Van then kicked four second-half penalties to add to his conversion before the break as Bradford kept alive their hopes of a top eight finish.
Shortly after, L'Estrange powered over and Ah Van added the conversion to leave the scores level at the break.
Wigan's efforts were aptly summed up by Hugo Rodallega's woeful free-kick from 30 yards that was more akin to a rugby conversion, and they continued to struggle after the break.
Cipriani was again off target with the conversion, but his penalty a minute before the break, and a missed attempt from Giteau, left England only a point adrift at the interval.
O'Gara added the conversion and it left Munster four points ahead at the break.
Lock Roberto Sidoli increased Ponty's hold with a try under the posts after a Ceri Sweeney break, Davey again on target with the conversion.
Myler's second successful conversion put Northampton 20-14 in front at the break and Gloucester reshuffled their back division for the second half, with Simpson-Daniel moving into midfield instead of Tim Molenaar and Charlie Sharples slotting in on the wing.
With three minutes remaining they rallied again and Stephenson finished off a break in the left corner although Jarvis missed the conversion.
Flanker Waldrom then charged through and over to finish off Flood's break with the outside-half kicking his fifth conversion of the game.
Richard Hill's side led 15-3 at the break, with David Hill adding a penalty and a conversion for Bristol.
King missed the conversion from the touchline and Tigers closed the gap shortly before the break with a third Goode penalty, but the league champions went in scratching their heads 9-13 down.
Blackmore burst through for his second try following a crossfield run from Harris, who added the touchline conversion, and then second-rower David Barnhill supported a magnificent break by substitute Jamie Mathiou to touch down.
Miah Nikora led Connacht's fight back with a try, conversion and penalty to reduce the gap to 13-10 at the break.
The hosts led 10-0 at the break thanks to David Strettle's try and Owen Farrell's conversion and penalty.
It was fitting reward for a sustained assault and although O'Gara could not add the conversion, the visitors would have been delighted with an 8-0 lead at the break.
Jackson missed the conversion from wide out as Saracens took a scarcely-deserved 11-6 lead into the break.
Farrell failed with the conversion, and, as the open style of rugby continued, Leinster mustered a response before the break.
Sexton tagged on the tricky conversion for a 10-point buffer at half-time, and it was his half-break that ignited Leinster's attack again for their bonus point try.
Five minutes after the restart, O'Sullivan's gut-busting break from his own 22 set up a try for Halstead and with Hickey's conversion Munster - missing virtually their entire first-choice side - had closed Ulster's lead to 21-10.
BBC: Paul Steinmetz gave Ulster the perfect start at Ravenhill
Morne Steyn slotted the conversion and, despite having been outplayed for much of the half, the visitors went in at the break trailing just 13-7 after Carter missed yet another penalty chance.
Mortlock added a penalty to make it 17-10 at the break, and the hosts were level four minutes into the second half when Mortlock landed the conversion after number eight Hoiles crossed wide out.
The hosts led 9-6 at the break with Gopperth scoring three penalties, wrapped around Christian Wade's try and Ryan Davies' conversion for Wasps.
However, Munster notched the opening score in the seventh minute after Tomas O'Leary's break set up de Villiers to score underneath the posts, with Ronan O'Gara adding the conversion.
And any thoughts of an upset disappeared on the stroke of the break as a swift Springbok passing move saw Montgomery go over in the corner and then land the conversion.
Grayson missed the conversion, and although he slotted a penalty in first-half injury time, Sale went in ahead at the break.
However, after the break three tries for Catalans from Olivier Elima, Dane Carlaw and Adam Mogg and one Gregory Mounis' conversion levelled the game.
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