nima1024 on "Safecss Error"

Hello all,

This is actually not a problem but a question actually, every time I check my WP security logs, I see there are 2 or 3 404 Errors which is about a link like this:

http://mysite.com/2013/06/safecss

And it's very obvious it returns 404 Error, because there is no file or folder names 'safecss' on that location.

My question is, what is this 'safecss' and how it cause this error?

The IP which is try to go to that link is always the same and from USA.

I usually see this error 4 or 5 times a day, I don't know if it's for theme or plugins or what.

Regards,
Nima