Bug#43853: APT: Keeps upgrading a package unnecessarily

[Julian Gilbey <J.D.Gilbey@qmw.ac.uk>]

Package: apt
Version: 0.3.10slink11

I am running an almost pure slink system, and since a few days ago,
every time I run apt-get update; apt-get dist-upgrade I receive the
following messages:

Reading Package Lists... Done
Building Dependency Tree... Done
Calculating Upgrade... Done
1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/359kB of archives. After unpacking 0B will be used.
Do you want to continue? [Y/n] 
(Reading database ... 54212 files and directories currently installed.)
Preparing to replace tclx76 7.6.0-3 (using .../tclx76_7.6.0-3_i386.deb) ...
Unpacking replacement tclx76 ...
Setting up tclx76 (7.6.0-3) ...
ldconfig: warning: can't open /usr/lib/libtkx.so.4.2 (No such file or directory), skipping
ldconfig: warning: can't open /usr/lib/libtclx.so.7.6 (No such file or directory), skipping
Checking available versions of tcl, updating links in /etc/alternatives ...
(You may modify the symlinks there yourself if desired - see `man ln'.)
Leaving tcl (/usr/bin/tcl) pointing to /usr/bin/tcl7.6.
Leaving wishx (/usr/bin/wishx) pointing to /usr/bin/wishx7.6.
Leaving tclhelp (/usr/bin/tclhelp) pointing to /usr/bin/tclhelp7.6.

There seems to be no reason for this: the tclx76 7.6.0-3 package seems
to be successfully installed--at least dpkg -l says it is, and yet APT
keeps trying to reinstall it.  Any ideas why this might be?

   Julian

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  Julian Gilbey, Dept of Maths, QMW, Univ. of London. J.D.Gilbey@qmw.ac.uk
        Debian GNU/Linux Developer,  see http://www.debian.org/~jdg