Since I use my Linkdump alot I come across this quite often. When I dump a blog — the main page or another index page, not an entry — sometimes I leave an unwanted footprint. The Linkdump reads the whole page to save it to the database. Doing so it tries to extract a Trackback URI. It snaps the first Trackback URI it can find and pings back using this URI.
So what happens when I dump the main page of a blog containing Trackback RDF? Linkdump, merely doing its duty, pings the first entry leaving a footprint larger than intented.
Entry Trackback RDF belongs to entry pages — nowhere else. On index instead, one could add a special Trackback RDF for indexes if needed.