One that sometimes shows up on the main TED site anyway. Regardless, people don't know what it means.

I've lost count of how many times someone has complained about an overly political, low quality talk and seen someone else come along and try to explain that it wasn't a real TED talk because it was a TEDx talk. Except on Hacker News, that person is usually just ignored. TEDx is substantially diluting the TED brand. Growth of TEDx has been far too fast and reckless.