port dependents

[Jonathan Stickel]

The command "port dependents foo" is not working for me.  For any port 
that has dependents, it returns that "foo depends on foo".  For example:

$ port version
Version: 1.9.1
$ port deps python26
Library Dependencies: gettext, zlib, openssl, tk, sqlite3, db46, 
ncurses, gdbm, bzip2, readline
$ port dependents zlib
zlib depends on zlib

For ports that do not have dependents, the command correctly states that 
there are no dependents.

Any ideas what could be wrong with my macports 
installation/configuration and how to fix it?

Thanks,
Jonathan

P.S.  Please cc me directly in replies since I subscribe to the digest.