Well, here are my odd findings. I too have see the Playready issue on a clean instal of 7068. However, it only happens on certain channels and more importantly, at certain signal strengths. I was trying to improve my QAM reception on some channels and tried a cable amp. Using Hauppauge's signal meter, I can see an improvement in the signal. However, I would suddenly get these Playready errors on random channels. If I remove the amp and thus lower the signal strength again, the channel comes back in just fine.
While this is far from a solution, perhaps it will spark some thinking in another direction as this seems to still be an ongoing issue.
Also, my programs list in Control Panel does show that I have version 1.3 of Playready installed.