| The maintainer of kde for debian (Ivan) has stated that the qt1apps section is no longer being maintained against the latest kde releases. As kde 2.1.x gets upgraded, there is an increasing chance that it will break the apps located in this section. Either remove it from your sources.list file, or use at your own risk .
Also, some things have been pulled from the unstable distribution and compiled against potato. These packages are in the “optional” section, which contains (among other things) ssh.
There’s no real need to include this section as far as I can tell, so you can remove it too.