Brumbies coach Stephen Larkham has had talks with Super Rugby's referees boss Lyndon Bray, unhappy with rule interpretations in recent losses.
He believes the Brumbies' great strength, their set-piece scoring platform, has been partially nullified by referees' focusing attention on the attacking team there.
The Brumbies have lost their early season mojo, scoring only nine tries in their last four games while conceding 15 since returning from their South Africa trip.
Preparing to face the Bulls at home on Friday, they are looking to turn around a run of four losses in their last six games which has dropped them behind the Melbourne Rebels and level on points with the NSW Waratahs in the Australian conference.
Larkham feels problems with refereeing interpretations were a big factor in the turnaround, after the Brumbies scored 19 tries while conceding just 10 over the first five rounds.