well, I hope you guys know that grey bar "used to" mean "banned" by G. But this seems to be different for some reason since the last update as I saw new sites get it as PR0. I haven't gone through articles yet, hoping someone would let us know here. I just hope this doesn't mean something negative. Fingers crossed.
I think one part of this is google removing repetitive content from their index. I have some internal pages that are like this. There are also newly created pages that are like. For example, this very thread shows the grey. I don't think it is anything to be concerned about.
I know that all new pages I have seen in many websites show grey bar, which is different from PR0. PR0 pages show white, not grey. I am not sure why G is doing this