Found some graphics bug in ACR 7.1. Known issue?
Look at the linked image. In the boxes where the numerical values are you can see some artifacts.
PS CS6 Ext, Macbook Pro 15'' mid 2009 with fresh Mountain Lion install.
Why do you assume, after upgrading to a new OS from Apple, that anything will work afterward? It's not like Apple gives a dang about maintaining compatibility with anything you already have.