Afterward, Singletary declined to discuss specifics. He said both players were wrong and there's "no more elephants in the room" -- an indication there once were elephants in the room. Davis can be volatile. Singletary has made him a team captain. Sounds like Davis might have gotten carried away a bit, reverting to past form, and that Singletary would like him to tone it down.
This should provide interesting story angles if, say, Davis has five touchdown passes and Crabtree has zero -- or vice versa -- at some point this season.
Update: Matt Maiocco's theory on what was bothering Davis.