Just this week a local, relatively conservative radio talk show did a program on media bias. One of the guests was a professor from the journalism department of the university here in town. She was genuinely puzzled about the whole issue of media bias. She kept saying that no professional journalist would ever go after a story deliberately intending to present a biased view.
While I would disagree that no professional journalist would do that--I think they often do--but most often I believe the problem is exactly this 'blind spot'. Journalists simply cannot imagine that there is another viewpoint.
Goes to show ya' just how few true professional journalists there are out there...