PD9 does some things better than PD8 when converting/importing WTV files that are recorded using WMC.
In particular, so far I have not seen the problem with gradual loss of sound sync with some resolutions (ie 720p) that happened in PD8.
However, if I first convert the WTV file to DVRMS format in Win7, then import the DVRMS file with PD9, the gradual sound sync issue returns.

What I have noticed is that the imported WTV file (now a m2ts file) is nearly impossible to edit and will not play in Windows media player. This happens at multple recorded resolutions.
What happens is that after clicking at different points on the timeline, it may take PD9 10 to 30 seconds to respond. And scrolling along the timeline becomes erratic and often only a specific few frames appear in the preview window no matter how far or fast or slow the scrolling occurs along the timeline.

A workaround is to re-render that first m2ts file directly (no edits) to either a m2ts or mpg file, then do editing with that re-rendered file.
By the way, for 720p content, the default 720p avc template will lock up during that re-render - a custom template needs to be generated (I used 15Mb rate instead) to avoid the lockup during the re-render. By lockup i mean that it will render a few seconds of the clip, then just stop. But PD9 remains responsive and will allow a 'cancel'.

I am hoping to avoid a multistep and time intensive re-re-render process.

Has anyone seen and hopefully solved this same problem?

The sytem has a Hauppauge 1600 PCI capture card, so has anyone experienced this card being a problem? And does anyone have any experience with the hauppauge 2250 PCIe card instead?

Thanks for any comments/input....

(I7-950 desktop; 6gbDDR3; NVidia 470; Raptor boot drive with 2Tb storage drive)