Where that pre-removal script is kept? I gues that problem is in permitions, what other problems can be with that script?
Preparing to replace finger 0.17-6 (using .../finger_0.17-7_i386.deb) ... dpkg (subprocess): unable to execute old pre-removal script: Permission denied dpkg: warning - old pre-removal script returned error exit status 2
I had this problem when I accidentally mounted /var as noexec. Make sure you have not done the same.
-Roberto Sanchez
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