Yep - this is definitely one of the many graphics bugs which were introduced with X2.

A lot of them have been nailed but not this one!

I too find them extremely useful when running through a project

I saw this in X2, but never got around to bugging it up.  (Many thanks to those who weren't as lazy as I.)  Specifically, the Now Time line that follows the play head plows over the peak marker graphics and only leaves the very left edge of them.
 
I would really like this one to be addressed.

I'm seeing the same problem on buses. Tracks seem to be somewhat OK. So I am confirming this as a bug.

It would seem that the now cursor is munging the displayed values. If you scroll the tracks up and down, they will refresh correctly.

I see it as an annoyance, but not a game stopper. I can see knowing where peaks are would be useful for manually riding faders, but for gain staging, you can always get the peak values from the console strips.

2 cents..