Flutist Dawn Weiss has played flute for 25 years in the Oregon Symphony. But new music director Carlos Kalmer sent her a letter last fall complaining of her “technical errors, poor pitch control, lack of leadership, choppy phrasing, failure to connect rehearsal corrections to performances, and an ‘airy and unpleasant’ sound quality.” Weiss worked on the issues, but Kalmer wasn’t satisfied. “And so a tense drama began, pitting a prominent musician in the orchestra against her conductor. After receiving the letter, Weiss pressed ahead with an improvement program. And when her efforts failed, she decided to break with symphony protocol and brought the warning letter she received and her story to The Oregonian last week.”