Looking at the logs for one of my sites, I just saw a whole series of about 20 strange requests from Googlebot. Here is a sample of three of them:
/CMS/administrator/index.php
/joomia_old/administrator/index.php
/test/administrator/index.php
All of these 20 requests took place in a period of about 4 seconds, and the server returned 404's for all of them.
Everything on this site was hand-coded by me in static xhtml. There have never been any scripts, CMS, Joomia, or other things of that nature on ths site.
Does anyone have any idea why Googlebot would make these strange requests?