There is probably another bug in cat and would be fantastic if someone else can confirm it. I found it in 3dsmax 2011 x64 with advantage pack.

How to reproduce:
1. create pelvis, spine and add an arm with fingers to the chest
2. select a finger and in Hierarchy panel and Link info change the Setup Mode - Static Matrix to Animation Controller
3. run this script line “$.controller[1].UseSetupController” without quote marks, you should get “true” statement
4. now add another arm to the same chest, this should add mirrored version of the previous arm chain with that finger already having Animation Controller in Setup Mode
5. run the same script line “$.controller[1].UseSetupController”, if the bug is real, you will get false
6. add absolute layer and switch CAT into animation mode, now check the Assign controller window, if the bug is real, there should be Setup:CATDummyMatrix3 controller on the finger

Haven’t tried it on other then finger bones yet, too tired of even figuring out this bug :(

Yes, Animation Controller is not mirrored correctly in CAT. Hence there is always created the Static Matrix on new bones.

My CAT demoreel:
http://www.youtube.com/watch?v=Gfq-4VoeAPU