Ok, reading your reply at TGB I won't be submitting my usercount simply because I don't have reliable data on what percentage of my users have installed TV-Pack/Fiji and who hasn't.
That being said, there are thousands of users of myTV in total and I know several of them have rolled back their "upgrade" because of issues (specifically MediaExperience). I also know a large number of them [users] have decided not to install TV-Pack simply because of the issue.
Also, producing AddIns not compatible with newly produced OEM machines are costing us [third party developers] money. I have already lost one System Builder due to this fact, which, looking at the history of custom, will cost me around $750/pcm. This OEM in particular said it was a hard decision to make, but certain features of TV-Pack were in the end deemed more useful than a fully fledged television archiving solution - of course, they have also said they'll come running back to me once this issue is resolved.
What bothers me most about all of this is the fact that so far none of my bugreports, feedback or direct email to Microsoft representatives have been acknowledged or acted upon. Like I have said in the past, if I didn't have a vested interest in Media Center I would very quickly move onto one of the other Media Center solutions available.