Here are all the files that seem to be about metalayer-crawler. I've left out all that are just symbolic links.

-rwxr-xr-x root/root 1712 2007-02-06 16:39 ./etc/init.d/metalayer-crawler0
-rw-r--r-- root/root 288 2007-04-18 10:05 ./var/lib/dpkg/info/metalayer-crawler0.md5sums
-rwxr-xr-x root/root 132 2007-06-29 12:39 ./var/lib/dpkg/info/libmetalayer0.postrm
-rw-r--r-- root/root 575 2007-06-29 12:39 ./var/lib/dpkg/info/libmetalayer0.shlibs
-rw-r--r-- root/root 31 2007-04-18 10:05 ./var/lib/dpkg/info/metalayer-crawler0.conffiles
-rwxr-xr-x root/root 135 2007-06-29 12:39 ./var/lib/dpkg/info/libmetalayer0.postinst
-rwxr-xr-x root/root 184 2007-04-18 10:04 ./var/lib/dpkg/info/metalayer-crawler0.postrm
-rw-r--r-- root/root 1126 2007-06-29 12:39 ./var/lib/dpkg/info/libmetalayer0.md5sums
-rwxr-xr-x root/root 302 2007-04-18 10:04 ./var/lib/dpkg/info/metalayer-crawler0.prerm
-rw-r--r-- root/root 250 2007-09-24 10:27 ./var/lib/dpkg/info/metalayer-crawler0.list
-rwxr-xr-x root/root 361 2007-04-18 10:04 ./var/lib/dpkg/info/metalayer-crawler0.postinst
-rwxr-xr-x root/root 22904 2007-04-18 10:04 ./usr/bin/metalayer-crawler
-rw-r--r-- root/root 28688 2007-06-29 12:39 ./usr/lib/libmetalayer.so.0.0.0
-rw-r--r-- root/root 939 2007-06-29 12:39 ./usr/share/libmetalayer/metadata_lib.conf

The only updated file is /var/lib/dpkg/info/metalayer-crawler0.list, and that's in the package installation database, nothing that affects the running of the application. If there were changes to metalayer-crawler they must be in non-obvious places..