Things haven't been going so well between the Ubuntu Community Council (UCC) and Kubuntu (the KDE-fueled Ubuntu spin off)--more specifically, between the UCC and Jonathan Riddell. If you're unsure what I'm speaking of, I'll make it simple. The UCC forced Riddell out as leader of the Kubuntu project. The release stemmed from the UCC believing that Riddell was becoming "increasingly difficult to deal with."
Of course, it grew quite heated and ugly from that point. You can read much of the email exchange between Riddell, UCC, and even Mark Shuttleworth here.