State Board of Chiropractic Examiners Chairman Richard Tyler issued a mea culpa Friday for the panel's questionable actions, even as the board refired its executive director and authorized a search for a permanent replacement. Acknowledging "gross errors in judgment," Tyler, appointed to the board by his longtime friend, Gov. Arnold Schwarzenegger, began the meeting with a contrite statement reflecting on the board's actions in a meeting earlier this month. In that March 1 meeting, the board fired its executive director without due notice, ejected a deputy attorney general, endorsed a controversial procedure involving anesthesia and accredited a college despite the...