apt-get source problem

[pkaplan1 at comcast.net]

Prior to experiencing problems w/ kde 4.2.1, I had http://ppa.launchpad.net/kubuntu-members-kde4/ubuntu intrepid main as an active repository. I have since reinstalled 8.10 from scratch, copied over the old /etc/apt/sources.list file, disabled the problematic repository and also UNchecked "Unsupported Packages", yet the kde 4.2.1 packages still appear as updates even after I force apt to rescan the package lists. 

Where is apt reading the kde4.2.1 debs from? 

Paul 
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