The error is produced by klogd. It has had various causes over the years (mismatches between glibc, binutils and sysklogd), but currently it seems to imply that System.map doesn't match the kernel and/or modules.

The only trace on [link|http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=7fdeat%24o60%241%40nslave1.tin.it|groups.google ] is in Italian, so enjoy ;-)