Here's a telling quote (and audience reaction) from the APA 2009 convention.
William T. Carpenter, Jr., MD, from the University of Maryland in Baltimore and head of the psychotic-disorders work group, which includes schizophrenia, outlined several main changes being considered in this area that might be controversial.
One of these questions is whether to retain schizoaffective disorder as a diagnostic entity. "We had hoped to get rid of schizoaffective as a diagnostic category because we don't think it's valid and we don't think it's reliable," he said. "On the other hand, we think it's absolutely indispensable to clinical practice," he added wryly, drawing a laugh from the audience.