Anyone else getting this apt error?

[Cakey (jon)]

E: Dynamic MMap ran out of room
E: Error occurred while processing galileopress-openbook (NewVersion1)
E: Problem with MergeList /var/lib/apt/lists/ftp.debian-unofficial.org_debian_dists_unstable_contrib_binary-amd64_Packages
E: The package lists or status file could not be parsed or opened.


I receive that message when running apt-get update.  Is it a problem on my end? (unstable)