I played a bit around and found a solution: Open and edit /usr/share/logwatch/scripts/services/clam-update and insert after line 7:
7: $ThisLine =~ s/ $//; NEW: $ThisLine = substr($ThisLine, 28); This fixes the problem, because Date/Time-stamp is discarded from input record. Greets -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org