It used to be that the toolbar was always a white 0 for new pages. It appears now that new pages no matter what the site are greyed out until they are indexed. Does this repersent a change in the coloring scheme? It might be important as I typically assume that a greyed out toolbar means that a site is penalized.
I noticed that sometimes google toolbar is in gray color then come back to it's normal PR. Sometimes google toolbar is not accurate.
It was suggested that gray toolbar is a sign of a page/site being banned form Google. Since you say all pages turn gray, then I would agree with Janna122003 that it might be a toolbar malfunction.