Same simptoms on upgrade from 2.6.1-2 to 2.6.1-3. (same arch and kernel) After removing libc6-i686, upgrade worked. However, on upgrade to 2.6.1-4 postinst segfault again. The interesting part is that right now, anything higher than 2.6.1-2 segfaults (3-5), always at /usr/share/debconf/frontend, *without* libc6-i686 installed. Regards