This was not a CE. It is being pushed to customers in particular markets (no I don't have a list yet) to address issues with R22 compatibility with locals in those markets. As HR21 receivers use the same code, it was easier to push it to every HR2x/R22 DVR in the selected markets rather than isolate individual DVRs.
As I said before, that is the only change, this is an incremental update. If you are interested in learning about the new features you'll be getting in the next national release, visit the Cutting Edge forum.