indyank - 3:45 pm on Sep 20, 2012 (gmt 0)
I do agree it is not an issue but id does give a sense of satisfaction when you don't see all those errors on your dashboard.
403 isn't really an error. It is just an html response.As I said before, all you had to do is to restrict access to wp-admin folder to your ip address. It doesn't need any alteration to the core wordpress files.
You just had to add this to .htaccess in your wp-admin folder.
Deny from all
Allow from <your ip address>