Font Book - validating font

Hi Everyone

Using Font book to load fonts on a work project at home on my Macbook Pro laptop (intel core).

Have validated all but one family of fonts (highlights in Red serious errors...Do Not use these Fonts).

I was told by the Apple shop to just ignore it - but this is a proper set of fonts and nothing should be wrong.

Any Advice on this (or) a work around to help please.

My old laptop with Panther then Tiger would take any font - but so many things flag up with this new laptop.

thanks in advance!