Hi, there:

I used to get a similar error message if I run "apt-get update" without amending the /etc/apt/apt.conf.d/00knoppix or /etc/apt/source.list beforehand. To be honest, I am not sure if it's the same case with synaptic. By the way, the following link may be of interest to you.

http://knoppix.net/forum/threads/314...elease-changed


ATB,