Hmm... I am wondering if I should do an blog on the HP about this.
But you mention running a different config all together.
Both Revs and myself are running MP 1.1.3 and you are running 1.2a, that might make a big difference. Furthermore I'm not using my onboard HD3200 but an HD5450 so that rules out the relation to the 3xxx cards. I've tried every codec combination possible before posting here so it's not like I just tried out one thing and made it a proven solution.
I had the problem with:
SAF4.00
SAF5.00 some older version and the latest RC1
CCCP (10-10-2010)
Seperate codecs (Haali-ffdshow-MPC stuff etc)
All with and without PowerDVD10
All came up with the same stuttering and freezing. I also use my config for HD, SD and DVD's but I only had stuttering with 1080p and the occasional 720p. Freezes came without warning and were random. Downgrading to 11.1 made my config work again like a charm. After downgrading I was still on SAF4.00 but I upgraded that to SAF5.00RC1. Still no problems.
So I understand why you post your experience, but I disagree with your arguments since it's not the same config.
Maybe the blog post can use an extra line mentioning 1.1.3 specific as a conformed test platform and that it might not occur when different versions or configs are used. However the blog post states "if you are suffering from problems as described" so it is not a definite issue or solution and situation may differ. I don't see anything wrong in warning the community for possible issues that might occur because it might still save people a lot of time and frustration.