Fool-proof way of ID'ing a 1080 progressive signal on a HD set?

[videobruce]

This is a issue with the current crop of HD TV's that can accept a computer signal thru HDMI.
There doesn't seem to be a positive way to confirm if the set is displaying an interlaced or progressive signal.
I know that isn't a issue with dediciated computer monitors (LCD displays in particular), but with Microdisplays (DLP, LCD & LCoS RPTVs') it is. There is one set that has been confirmed, but there are others that no one can say one way or the other.

Resolution isn't a problem, it's just the 'i' vs 'p' issue.

Is there some s/w program that is a 3rd party to ATI and nVidea that will positively tell if the display is interlaced or progressive?

[ProfessorU]

Well in standard def, when you play video back, you can tell just by watching full motion video. I'd imagine you could tell in HD, too.

I will make motion look buttery smooth
P will make it appear choppy, like movies in the theater.

You can usually get an idea of I vs. P when you pause video, also. If you get flicker on pause, it's probably I.

[videobruce]

That's ok if you are watching something you recorded, but 'live TV' it won't help.
Anyways, I'm referring to a computer output.