I was just using dselect to try to update my potato box, when I got this message while doing a "[U]date".
Reading Package Lists... Error! E: Malformed Priority line E: Error occured while processing aleph-dev (NewVersion1) E: Problem with MergeList /var/state/apt/lists/http.us.debian.org_debian_dists_unstable_main_binary-i386_Packages E: The package lists or status file could not be parsed or opened. update available list script returned error exit status 100. Has the package listing format changed recently? I do tend to keep this box really up to date. Usually update once a day. Marshal