Because you weren't listening? There were lots of complaints about the way Apple handled their obligations under the LGPL licence of the KHTML code Apple based Webkit on from the KHTML devs, at least there was in the earlier days of the Webkit project, I think Apple did improve the way they handled the code after a while, but I haven't really kept up on it so I don't know if they have improved enough to the satisfaction of the KHTML devs or not.