Ever since upgrading from Karmic to Lucid, Nautilus is using a lot of memory. I've got only got a gig of RAM, but Nautilus is always taking up at least 10%, even if there are no Nautilus windows open, and often it's a lot more. If I kill the process it just comes back, using just as much memory (if not more). I don't recall it doing this before I upgraded. Is this normal?