Problem configuring bash with apt-get

["insomniux" <dispose01@bosschaert.org>]

Hi,
With the last upgrade of my debian system, I obviously did something
wrong. Now I get this error with each attempt to install a package with
apt-get:

Setting up bash (2.05b-26) ...
chmod: invalid mode: --reference=/etc/shells
dpkg: error processing bash (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 bash
E: Sub-process /usr/bin/dpkg returned an error code (1)

Is there a way to solve this problem?

Thanks
Insomniux