Weird shadow always renders on cylinders

AmbientOcclusion
1

For some reason, I get a wierd gradient with an abrupt edge every time I render anything based on an arc or a circle.

2

cylanders.jpg1920×1080 508 KB

3

Dan, what version of AmbientOcclusion are you running? Please make sure you have the latest one installed (1.9.7)

4

I was running 1.8.3. It was fixed by the update