[Ferox]

I don't think statcounter is an issue. I have it on three blogs and they get indexed fine, as well as earnng themselves little pageranks. Anyway, google analytics is invisible, most traffic trackers are. If they had a blanket rule of not liking anything invisible then they'd penalise people for using their own services.

They don't like invisible words though, where you change the font colour to match the background colour, so you can stuff keywords into a page that your readers don't have to read.