Apt-get :: upgrade crash?!

Hello, i upgraded my packages and all goes right until the configuration of bash (2.05b-26)

[/CODE]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 [CODE]

because im new with linux i don't know what to do or how to fix it!

original here.