Gaston Gaudio was also using the old HPS 6.1 paintjob on his racquet at the US Open. Perhaps they just refuse to use paintjobs a la Tommy Haas, Wayne Ferreria, Philippoussis, Sampras, Spadea, etc.
There was a guy playing on TV the other day with a Prince Warrior paintjob. I can't remember who he was but I think he lost the match.