As of right now I can only launch to a 0 degree inclination. Also the ship goes straight up to apoapsis before turning and firing the engines. If set for a 180 degree inclination it will initially act as though it's going to heel over to 180, but suddenly swings back to 0 inclination. I had this behavior in 2.2.1 and thought updating to the latest stable build (#255) would cure it, but it's still doing it. Corrective steering is selected. This behavior seems to ignore the ascent path editor as well.

Mod List:

MechJeb
Ferram Aerospace Research
Kethane
Extraplanetary Launchpads
KSP Interstellar
B9 Aerospace
KW Rocketry
NovaPunch 2
Kerbal Attachment System
Infernal Robotics
Procedural Dynamics
Procedural Fairings
Stretchy SRB

I've tried different combinations of settings but nothing seems to fix the issue. As I was writing this I built a vanilla ship and it had the same behavior. Starts to go towards 180 and suddenly swings back to 0.

Edit 5/16/14 10:05am : I updated ModuleManager to the latest version (2.1.0) and it appears that it has fixed the problem, sort of. However I've noticed that the flight path editor seems to have an effect on the ascent AP even if the check box is not checked. If set to manual and unchecked the flight goes straight up and then burns. Set to automatic and unchecked the flight follows the automatic flight path. However, I can work with this so I'm happy.