With a full compliment of Scottish Premiership matches kicking off on Saturday afternoon, it was a difficult day for the division's leaders with none of the top four winning.
Celtic were held to a goalless draw by Hearts despite dominating the match, while Aberdeen's 100% record is gone after a 2-1 loss at Inverness Caledonian Thistle.
Miles Storey and Ryan Christie gave Inverness a two-goal lead and Ash Taylor's goal was not enough as the Dons slipped to defeat.
Dundee came from two goals down to draw 3-3 against Ross County. Andrew Davies's red card proved crucial as Rory Loy netted twice to rescue a point for the Dee.
Ten-man St Johnstone beat Dundee United 2-1. Billy McKay gave United the lead from the penalty spot after goalkeeper Alan Mannus was sent off, but second-half goals from Graham Cummins and Simon Lappin secured the points for the Saints.
Elsewhere, Hamilton Academical defeated Kilmarnock 2-1, thanks to goals from Dougie Imrie and Ali Crawford, and Motherwell beat Partick Thistle 2-0.
Results in full: Celtic 0-0 Hearts (0-0), Dundee 3-3 Ross County (1-3), Inverness Caledonian Thistle 2-1 Aberdeen (2-1), Kilmarnock 1-2 Hamilton Academical (1-0), Motherwell 2-1 Partick Thistle (1-0), St Johnstone 2-1 Dundee United (0-1)
