I've now seen the highlights from Ibrox and they actually only showed one of the three penalty shouts I was talking about. They did however manage to find another one that I'd forgotten about and that one and the first Boyd one (on the bye-line) were both stick-ons imho. So, the ref gave a penalty for Ranger's fourth big shout in the ten minutes leading up to half time. I think he reckoned that the four incidents simply added up to at least one penalty