Hi! Thanks for submitting this bug, I've just confirmed it is indeed a postinst problem.
clamav postinst scripts run "invoke-rc.d start" without checking if the process is already started before doing so, which creates this error 1 ** Changed in: clamav (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/996541 Title: package clamav-milter 0.97.3+dfsg-1ubuntu0.11.04.1~lucid1 failed to install/upgrade: η υποδιεργασία installed post-installation script επέστρεψε κατάσταση λάθους 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/clamav/+bug/996541/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs