I have done a HD install of KNOPPIX. Just wondering if it is normal for some failures when I run apt-get update?

Things like
Err http://people.debian.org sid/i386/ Packages
404 Not Found
Err http://people.debian.org sid/source/ Sources
404 Not Found
Err http://non-us.debian.org ./ Packages
404 Not Found
Err http://non-us.debian.org ./ Sources
404 Not Found
Ign ftp://ftp.gwdg.de unstable/non-free Release
Failed to fetch http://non-us.debian.org/~kitame/mozilla/./Packages.gz 404 Not Found
Failed to fetch http://non-us.debian.org/~kitame/mozilla/./Sources.gz 404 Not Found
Failed to fetch http://people.debian.org/~branden/pa...86/Packages.gz 404 Not Found
Failed to fetch http://people.debian.org/~branden/pa...rce/Sources.gz 404 Not Found
Reading Package Lists... Done
W: Couldn't stat source package list http://non-us.debian.org ./ Packages (/var/lib/apt/lists/non-us.debian.org_%7ekitame_mozilla_._Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://people.debian.org sid/i386/ Packages (/var/lib/apt/lists/people.debian.org_%7ebranden_packages_sid_i386_Pac kages) - stat (2 No such file or directory)
W: You may want to run apt-get update to correct these problems
E: Some index files failed to download, they have been ignored, or old ones used instead.

Reason I ask is that I have a citrix ICA client installed that does not work.
when I run ldd /usr/lib/ICAClient/wfica
libXaw.so.6 => not found
libXt.so.6 => /usr/X11R6/lib/libXt.so.6 (0x418b0000)

Just wondering if somehow the update is not working or what I can do to get this file. Tried finding it but it seems all the links go to Redhat and they are all unavailable.