Maybe so, just a spidering glitch, weird links, or sitemap error? I was searching this morning in Google doing some tests on Google's new Whois feature. When I plugged in a domain what popped up in the first page of the results was a weird URL including encoded ampersand and other characters in front of the shown URL for the website (aboutus.org). Once I clicked on the link I got a 404 error.
Link to Result.