[beojan]

You'll have to run
apt-get install debian-archive-keyring
apt-get install

[kr4ey]

To fix your fonts in Debian you can try this link.

MikeyP.com | linux

I found this from a thread on the Debian User Forums.

I tried this with Debian Lenny and it works great.

[kr4ey]

Originally Posted by MetalheadGautham

OK, I have installed Sidux KDE Full 2008.1 DVD.
I must admit that it rocks.
Here is my experience with it: The Smaller Bang

anyway, I have one issue with it:

W: GPG error: http://ftp.tw.debian.org unstable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 07DC563D1F41B907
W: You may want to run apt-get update to correct these problems

What do I do to fix it ?

You have to run the script called SMXI in your terminal as root. See the sidux website for the manual and forum. sidux.com :: debian based live cd development

su
password
smxi

To update your keys, install new kernels and dist-upgrade.
Word of caution with sidux. Never use a package manager to install anything (use apt) and never upgrade in X.