Rangers just about made it past The Doonhamers 4-3 at Ibrox, and their defence came into question after the match.
The Light Blues had appeared to be on their way to another comprehensive victory, but they allowed the visitors a route back into the match after building up a healthy advantage.
At one stage Rangers were 4-1 up in the contest, but two quick fire goals form Queens made it a nervy ending for the league leaders.
Rangers did hold on, however, and Warburton insists that the defence are not solely to blame for his team’s problems.
"People go on about the defence but don't forget we conceded two in 10 not long ago,” he said.
"At that point, nobody is going: 'Wow your defence is magnificent, you don't have to recruit any more' - we're a team, it's not about the defence. We weren't tight enough from the front.
"We don't concede a goal if we take care of the football but we gave it away. The problems start when you give possession away, when you make a poor decision.
"Rob Kiernan has been outstanding as has Danny Wilson alongside. Tav (James Tavernier) and Lee Wallace - with their contributions going forward and defensively - have been first class.”
Rangers have now failed to keep a clean sheet in their last three matches, and they have conceded seven times during that period.
Warburton’s side still remain clear at the top of the Scottish Championship table, though, and they are closing in on promotion.
Rangers are currently 14 points ahead of Falkirk, who are their nearest rivals in the race for the title.