Every time your browser loads an new url, it also request a file
called ‘favicon.ico’ in the same subdirectory. This generates a LOT of
errors in the Ruby on Rails logs of my app.
One way to avoid those errors is to redirect the browser to the root /favicon.ico file.
Just add this line in the /public/.htaccess file of your rails project :
RewriteRule ^(.*)favicon.ico$ favicon.ico [QSA]
Do you use another method to resolve this problem ?