If you having problem with Restricted Content Errors on your CableCard setup Microsoft want to hear from you:

Microsoft is investigating the Restricted Content Error many of you have reported in various threads. We are attempting to reproduce the problem in our test labs, and are trying to understand if this was caused by a Windows Update, the device FW, or has some other root cause. We are also looking into updates from Windows Update that were made available on or around 5/15 to understand if any of them could explain the issue being reported.

The test is being done with instrumented code that will allow us to have better visibility into the state of the PC when the issue occurs. As part of that test, we are loading Vista SP1 and all of the updates, and are running the test with an ATI TV Wonder Digital Cable Tuner with the 1.17.1 firmware installed. Because of the reports that this occurs after periods over a day long, Microsoft's tests will be setup to run for an extended period. MS hopes to have some results by tomorrow, but will let it run over the weekend if we have not reproduced the problem yet.

These posts are a great way to understand the issue more, so continue to post if you have any additional information of relevance that will help us determine what may have caused this. For those that are seeing it and have not reported it, it would be helpful if you could continue to post your machine configuration and other relevant information. Make sure to including PC Make/Model number, Graphics Card/Display Driver version, specific Cable Provider and location city, and additional troubleshooting steps you have taken. We would also like to hear whether anyone has seen the issue with the previous 1.16 version of FW, and what the content is that is affected if it makes a difference. This will help us narrow down whether it is configuration based, cable provider/region based, Windows Update based, Digital Cable Tuner firmware based, or content based.  Thanks for those

(via Missing Remote)

The Green Button - Microsoft Investigation of the Digital Cable Tuner Restricted Content Error