Error updating unstable non-free Packages

[Tim Wood <tleathley@bigpond.com>]

Don't know if it's just me but I'm getting an error trying to update. I 
get the same on:
ftp.wa.au.debian.org
ftp.au.debian.org
ftp.uk.debian.org

I get a parsing error in  unstable non-free Packages, which results in 
"Dynamic MMap ran out of room" error.
This occurs parsing package graphviz (NewVersion1).

If this is a bug where do I report it as occuring?
If not, where might the fault lie?

Tim