After buying Pro, upgrading to 5.0.1 and spending over five hours narrowing it down, aside from issues mentioned in other posts on the topic, wheel colliders attached to a car object are now completely broken. For both my own application and in the car tutorial, each is now:
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Drawn incorrectly, at a distance from its local origin inversely proportional to the parent transform’s scale, e.g. if the parent transform is set to a scale of 0.1, its green circle gizmo is drawn ten times further from the parent transform’s origin than the wheel collider’s object’s actual position.
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Physically out of whack. By default, the instant it hits the terrain the whole car now flies up and to the side at about a thousand miles per hour. Even after I turn its default Spring (35000) and Damper (4500) down to one or two, it still gets slammed downwards.
Are these expected to be resolved in the next release? My, what a sweeping improvement of Unity’s development pipeline it would be to add a “unit test” step at some point before release.