Meshes no longer rendering after Unity upgrade

I upgraded to Unity 4.6.3 and now none of my custom meshes on Canvas renders are drawing... Any ideas as to why?

 

Hmm, could be something as simple as a regression issue.
Have you tried the latest patch release? If it still doesn't work, I'd log it with a sample project

 

I am using the latest and greatest: 4.6.3f1

I have tracked it down to this code I have for sorting by z-value... I expect it has something to do with removing and re-adding the child objects instead of assigning the new position.

public static void SortChildren(GameObject pParentGo)
{
// Sort the children by z value
List<Transform> children = new List<Transform>();
for (int i = pParentGo.transform.childCount - 1; i >= 0; i--)
{
Transform child = pParentGo.transform.GetChild (i);
children.Add (child);
child.SetParent(null);
}
children.Sort((Transform t1, Transform t2) => { return t2.transform.position.z.CompareTo(t1.transform.position.z); });
foreach (Transform child in children)
{
child.SetParent(pParentGo.transform);
}
}

 

Yes, removing:

child.SetParent(null)
child.SetParent(pParentGo.transform)​

and replacing them with

child.SetSibilingIndex(i)​

cleared this right up.