Cannot install maildrop after courier-base and vice versa

[Derrick]

Binary package hint: courier-base

When trying to apt-get install courier-base after already installing maildrop, I get the following error:

update-alternatives: error: alternative link /usr/share/man/man5/maildir.5.gz is already managed by maildir.5.gz.
dpkg: error processing courier-base (--configure):
 subprocess installed post-installation script returned error exit status 2
E: Sub-process /usr/bin/dpkg returned an error code (1)

If I install courier-base first, then try to install maildrop, I get the same error about /man5/maildir

I'm not sure, but it may be related to this debian bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=521037

[Derrick (emrikol)]

I forgot to add this is for:
Description: Ubuntu 9.10
Release: 9.10