Since the only problem seems to be with /usr/share/mimelnk/application/vnd.sun.xml.(XXXX).template.desktop files which are part of openoffice-de-en, it might work to remove openoffice-de-en ("apt-get remove --purge openoffice*") then finish updating kde then reinstall openoffice.
For the reinstall use the standard openoffice package instead of the openoffice-de-en package which I think is special to Knoppix. This should also get the benefit of installing the openoffice help files which are (or at least used to be-I haven't used Knoppix 3.7 or 3. absent from Knoppix probably for space reasons.
There is also a kde integration package for openoffice which gives a kde 'look & feel' to openoffice but I don't think there is a .deb package for it. I have installed it using the standard openoffice install package.