You mean other than the fact that Cain is a buffoon and his “campaign” is a circus?
I see Cain a smart businessman and happy warrior who is nowhere even close to being ready to run a serious presidential campaign. If he got the nomination I think he would be destroyed in Christine O' Donnell fashion - ie, lose by a landslide with a core of supporters who simply can't understand that their candidate was an awful general election choice. I just can not take him seriously and don't see why so many people are throwing all in on a political novice who really has no chance whatsoever to beat Obama. I guess every so often some of the base is willing to commit electoral suicide to make a point?
Anyway, just because Perry's campaign denied it doesn't mean they aren't lying. Cain's team could well be right, but it is seriously ill advised to make such an accusation without proof. Until they can demonstrate any convincing evidence, Cain's team is making ugly allegations against another Republican while at the same time complaining that they are being unfairly attacked with ugly allegations.