4.5 2D Collisions - Boxes rolling and wobbling

I just upgraded to newest version of Unity that was released today, and the new 2D physics changes make things look really odd. For instance, I have an L-shaped object that consists of 2 BoxCollider2Ds parented to a game object with a RigidBody2D. When dropped onto the ground collider, the object rolls around a bit like a circle collider, then see-saws before finally settling.
Before, it would just drop and fall over, like I wanted, now it wobbles about. Similar wobbling happens when a plain box collider is dropped.
I've tried tweaking the 2D settings, but I can't get the physics to act as they did before the update. Any suggestions, aside from downgrading?
Thanks.

 

After upgrade I experienced almost similar problems with CircleCollider2D. It's not rolling properly (like it did before update). It almost just slides down the "hill". I tried also tweaking the settings, can't get it work like before update.

 

I would recommend experimenting with the new Rotational Inertia property. They substantially changed how rotational inertia works, which seems likely to be related to both your problems.

From the release notes:

•2D rigid-body rotational inertia no longer scales with collider size but rather with the rigid-body mass.
...
•Can now set the Rigidbody2D rotational inertia.

 

Thanks Pyrian. Worked for me!

 

OK, you're on to something with the inertia. If I tweak my rigidbodies' inertia I can get them to behave more like they did in 4.3. However, it means I will have to tweak all my prefabs and get the correct inertia through trial and error.

 

Thanks for the lead, but no matter what I set the inertia to, I can't get it to work like it did before. I basically have to remake my game because the 2D physics are so different now. This is very inconvenient.

 

I made a temporary fix for that: http://forum.unity3d.com/threads/24...ia-fix-InertiaCalculator-component-and-editor

 

Unity is fixing it... probably best to just wait.