[Plugin: WordPress.com Stats] Help with 404 page not found errors

Good Day,

My site is and I am using the Stats plugin. Several times a day, I see users like these:

#1 – Guest 74.82.68.34 on March 3, 2011 @ 11:35 AM
WORLD free NEWS » Page not found [url] [referral]

#2 – Guest 74.82.68.32 on March 3, 2011 @ 11:34 AM
WORLD free NEWS » Page not found [url] [referral]

An example “referral” link is

The “url” is usually

Can someone please help me figure out what is happening? Are users actually going to and seeing a 404 page? How do I fix this?

http://wordpress.org/extend/plugins/stats/