error logs -> file not found /favicon.ico

Something funky is going on with my error logs
I have just repaired a '404 page not found' issue in my .htaccess by adding```
ErrorDocument 404 /index.php?main_page=page_not_found

This is working fine, but my error logs are now showing up with ' ->file not found   /favicon.ico' 
It appears that users linking to my page are landing on 'http://perfectconcepts.com.au/favicon.ico'
I've done some research on it but can't get my head around it.
Any Ideas?

Anytime someone bookmarks your page or a browser attempts to show the favicon in the browser address bar (ie: firefox, opera, etc), there will be a request to your server for the favicon.ico file.

If you don't have one, then you'll see errors in your logs saying it couldn't serve the requested file.

The fix is simple: create one.

Thank you DrByte, it seems to have fixed the problem.