“Embattled Skylight Opera Theatre managing director Eric Dillner has resigned, ending a standoff that pitted company management and its board of directors against the artists who have regularly worked for the troupe. … William Theisen, whose dismissal on June 16 began the strife at the Skylight, will not return as artistic director, but he will direct four of the five shows he originally planned to stage for the 2009-’10 season – the company’s 50th.”