Sampdoria beat neighbours Genoa 3-1 to end a run of seven straight defeats and Inter Milan fumed over referees as Italy's Serie A football competition threw up a rash of red cards, own goals and another coaching victim.
Pescara coach Giovanni Stroppa, in charge for only 13 games, became the fifth coaching victim of the season after his side missed a penalty and had two players dismissed in a 1-0 defeat to fellow strugglers Siena.
Four players were sent off, three of them from Palermo, and two penalties were awarded as hosts Bologna beat the Sicilian side 3-0.
Second-placed Inter Milan were rescued by a late own goal from Davide Astori as they drew 2-2 at home to Cagliari but were furious after having a stoppage-time penalty appeal turned down and had coach Andrea Stramaccioni sent off for dissent.
Two goals from Alberto Aquilani helped Fiorentina thrash Atalanta 4-1 in Florence to go third.
Parma twice came from behind to draw 2-2 at Udinese while defending champions Juventus, held 0-0 at home by Lazio on Sunday, lead with 32 points from 13 games. Inter are four points behind with Fiorentina and Napoli, who drew 2-2 with AC Milan on Saturday, a further point adrift.