If "Close windows when quitting an app" is unchecked in the General page in System Preferences, quitting NetNewsWire while in full screen mode and reopening it causes the app to reopen in full-screen mode for a split second, but then suddenly flash black and go back to the desktop in windowed mode.

If "Close windows when quitting an app" is unchecked in the General page in System Preferences, quitting NetNewsWire while in full screen mode and reopening it causes the app to reopen in full-screen mode for a split second, but then suddenly flash black and go back to the desktop in windowed mode.