In an SEC filing from yesterday, attorney Joe Siegelbaum tendered his resignation from the board of Emmis Communications. Emmis says "the resignation was not due to any disagreement with Emmis on any matter relating to Emmis' operations, policies or practices." Siegelbaum's departure comes as Emmis begins a buyback of some of its 6.25% preferred notes. Siegelbaum was originally nominated as a director by preferred stock owner Zazove Associates. His term wasn't due to expire until 2012. Zazove also nominated David Gale of Delta Dividend Group, also for a term that expires in 2012.