I'm using a Samsung SIR-T150 STB with a Sony 36XBR450 monitor. Whenever a widescreen digital picture is shown, there is a major change in the black level of the picture. Dark areas get exceedingly dark, washing out details. A major change in the brightness setting is necessary to overcome this. But even then, it does not completely fix the problem. When non-widescreen commercials are shown throughout a program, the black levels revert to normal. What's happening here? Is it "normal"....my TV?...the STB? Thanks for any assistance!