I have been told by a colleague with another firm that they experienced some problems with using Riverbeds on projects that are being done in multiple offices. In short, Revit's element borrowing data was being blocked by the Riverbeds, so it was possible for multiple users to "borrow" the same "element". The problem only happened on projects that spanned multiple offices.

He think they were able to fix the problem by turning the Riverbed's filter off for Revit files.

We have not experienced this problem, and I was wondering if anyone else has run across this.