An apparent system error left millions of visitors to the site puzzled when links to all search results were flagged with the warning 'This site may harm your computer'.
It is thought the site had erroneously identified all other websites - and some of its own pages - as containing malicious software or 'malware'.
I noticed this yesterday. I was looking up the Teddy Roosevelt quote "malefactors of great wealth" and that warning kept coming up with every search result, but I thought it had to do with confusion over the "mal" in "malefactor" -- perhaps the Google machine thought I was looking for "malware."