An interesting trend I've noticed on NPR is that an intriguing bit of information will come up during a report or interview (a bit of information that sheds light on one of the most significant aspects of a story) and there will be no follow up investigation or questioning on that point.
This morning offered a good example: NPR is interviewing a Marine captain who thinks he may soon be reactivated from the Marine Reserves and sent to Iraq. He mentions, in passing, that the reserves are meant to be used for "national emergencies" not troop shortages in an ongoing conflict.
Hmmm...a president who is misusing the military reserves to pursue a failed policy in order to save his political reputation and that of his party: Now that's a story! Follow-up or comment from NPR? Not a bit.