The pressure mounted on Aberdeen manager Mark McGhee after his side followed up a 9-0 thrashing at Celtic with a 2-1 home defeat to Inverness at Pittodrie.
Adam Rooney converted a 34th-minute penalty to give Caley Thistle the lead after Grant Munro had been fouled in the box in an off-the-ball incident.
The Dons battled back and substitute Andrius Velicka, who had replaced the injured Darren Mackie, showed great composure in slotting the ball past the advancing Ryan Esson five minutes after the break.
However, with nine minutes remaining Munro headed home Richie Foran's cross to defeat the Dons.
The result preserves Terry Butcher's side's year-long unbeaten away run but may have severe repercussions for McGhee, whose team have now picked up only four points from the last possible 30.
Source: PA
Source: PA