In the post How New Managers Fail Individual Contributors Camille Fournier makes a great point about the split between “managerial” and “technical” career tracks:
Most people become managers right at the point where career tracks split between “technical” and “management” specializations. The result is that many new managers have most recently been very technical, yet they have no idea what it means to climb the technical track, but they will be managing people who want to follow that path. To be a great manager, you can’t afford to let the ICs on your team feel that they have no career path, so it’s up to you to manage this well.
She goes on to to list five pitfalls that new managers should work to avoid in order to set their direct reports up for success.