I have the new ACR 126.96.36.199 and I have found a few problems. The most common problem is a failure
to detect the camera and lens combination even when it is available in the list.
For example, I have shot with a Canon 40D and a 70-200mm f4L. Sometimes
ACR tries to provide the lens but it comes up as 70-200mm f2.8L. Sometimes
just selecting "enable" brings in all of the lens detail---but often incorrect. At other
times, I have to select manually. The lens information is always available to ACR.
The more similar lens choices presented, the less likely ACR will find a match. For example,
there are quite a few 70-200 lens options to choose from---some differeing only in IS others
in focal range or f stops.
Hope this information is helpful.
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