Indicate either in the Review Materials overview, or in the file differences view when a file has been moved or renamed. This information is tracked by a number of Version Control systems, and cl...
I want to strongly second this.
We can use Code Collaborator to (gently) argue over variable and function names, to give our code a consistent, logical look. But a less-than-optimal file name? We are stuck with it on projects that can run for years.
SVN (which we use) is fine tracking file name changes. A little smarter parsing of the SVN history should work.