Richard didn't complain about his set. He was just kinda surprised (and disappointed, if you will) that he was only given an hour. To roughly quote him, he said something along the lines of "all that paperwork and what not for only an hour?"
Portishead (in an interview before the festival I believe) said they weren't happy about subheadlining after Prince was added. Not sure if that's what boourns is referring to though.