Multiple reports indicate that the Falcon 9 launch scheduled for Vandenberg on Sunday morning has been definitely postponed. It looks as if SpaceX will attempt another static hot fire next Wednesday, with a launch to follow at a later date if all goes well.
A static fire on Thursday revealed anomalies, although SpaceX has been tight lipped about the nature of the problem. Stories circulated that the company was planning another hot fire today, but there is no evidence that it happened.
The launch will be the first for the upgraded Falcon 9 version 1.1., which is set to put a Canadian satellite named CASSIOPE into polar orbit.