Thinking again, I'm pretty certain that the LED meters worked with PT10, but I found them almost useless because only the bottom two would light up, simply because track levels were mostly under -15dbfs or so.
And I guess with all the new functionality of meters in PT, they didn't bother to preserve C8 compatibility.
I tried "Pro tools classic" option in metering preferences, and all the other options, without any luck.
Oh, well…