Forum Moderators: DixonJones
;)
Robots.txt is a file where you can exclude robots from certain areas of your site. If you just upload a blank robots.txt this will cut down on your error numbers.
For the 404:/_vti_bin/owssvr.dll error just read the forum page.
favicon.ico is the default name for the 'bookmark' icon that you might see to the left of the URL in your browser. If you don't have one, then requests will generate a 404 error.
robots.txt is a text file used to let robots/spiders know which pages to index/not index on your site. Again, if you don't have one, every visit from a search engine or other robot will generate a 404.
The vti_bin/ requests are generally attempts to exploit IIS servers, or those running FrontPage extensions. You can block these and other attacks using .htaccess/mod_rewrite (see the Apache forum).
Edit: beat me to it ;)