In my Apache log yesterday, I noticed these strange errors:

127.0.0.1 - - [17/Apr/2011:15:02:36 +0100] "GET /icons/blank.gif HTTP/1.1" 200 487 "http://localhost/" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
127.0.0.1 - - [17/Apr/2011:15:02:36 +0100] "GET /icons/layout.gif HTTP/1.1" 200 616 "http://localhost/" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
127.0.0.1 - - [17/Apr/2011:15:02:36 +0100] "GET /icons/text.gif HTTP/1.1" 200 569 "http://localhost/" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
127.0.0.1 - - [17/Apr/2011:00:02:36 +0100] "GET /icons/folder.gif HTTP/1.1" 200 564 "http://localhost/" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
127.0.0.1 - - [17/Apr/2011:15:02:36 +0100] "GET /icons/image2.gif HTTP/1.1" 200 650 "http://localhost/" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
127.0.0.1 - - [17/Apr/2011:15:02:36 +0100] "GET /icons/unknown.gif HTTP/1.1" 200 585 "http://localhost/" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
127.0.0.1 - - [17/Apr/2011:15:02:36 +0100] "GET /icons/compressed.gif HTTP/1.1" 200 1379 "http://localhost/" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
127.0.0.1 - - [17/Apr/2011:15:02:36 +0100] "GET /favicon.ico HTTP/1.1" 200 39421 "-" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"

How could this have happened, and what should I do to prevent this?
I know for a fact I don't have any /icons folder directory, only the favicon.ico file, so this is puzzling me.
Figuring out what caused it that is the problem here.

Thanks! :)

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