apt package listing error.

[Marshal Wong <masee@usa.net>]

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