Mark apologized over a member of the Canonical legal team asserting their trademark rights over the Fix Ubuntu debacle with the web-site guiding users on how to disable remote searches with the Unity scopes on recent versions of Ubuntu Linux.
Mark then added, "On another, more personal note, I made a mistake myself when I used the label “open source tea party” to refer to the vocal non-technical critics of work that Canonical does. That was unnecessary and quite possibly equally offensive to members of the real Tea Party (hi there!) and the people with vocal non-technical criticism of work that Canonical does (hello there!)."
If you missed his original comments of going after those opposed to Mir, see the article from last month. Mark was challenged over the comments for a debate with KDE's Aaron Siego, but Mark hasn't responded to that offer, and some KDE developers continue to be disgruntled with Canonical.
Mark's apologies can be found via his blog.