MOSS 2007 - Search return results with empty text, only icon

I encountered a strange behavior today with my MOSS2007 Enteprise site and the search module.

When I launch a search, here is the result I get:

For each line, there is a thumbnail but no text ! In addition to that, when I clicked a link, i get a 403 error.

Is there anyone that already encountered this issue ?

Thanks for your advices.