From the APN press release (via Creative Loafing):
At a very fundamental, core level, Springston did not share our vision for a news publication with a progressive perspective. He held on to the notion that there was an objective reality that could be reported objectively, despite the fact that that was not our editorial policy at Atlanta Progressive News. It just wasn’t the right fit. ...APN certainly has a right to pursue its political vision as it sees fit (although it's opinion about objectivity in news seems highly subjective). But we should expect these fissures in reality to grow and to consume more professional journalists.
We believe there is no such thing as objective news. Typically, mainstream media presents itself as objective but is actually skewed towards promoting the corporate agenda of the ultra-wealthy.
The idea that there is a field of reason where all sides can meet is falling out of fashion. Increasingly, journalists are being asked to choose sides (usually partisan), which is especially difficult for people who subscribe to the belief that all sides are equally flawed.