"Users sometimes post bad content on websites that are normally safe," the page explained.
It's not clear how long google.com has been flagged as "partially dangerous," although some reddit users noticed it Tuesday -- the same day the Site Status page says its information was last updated. A flurry of blog posts from last November suggest google.com was also flagged with the dubious distinction back then.
But google.com is far from alone. Several other major sites that thrive on user-generated content are also listed as "partially dangerous" by Safe Browsing at the moment, including "tumblr.com" and popular code sharing site "github.com." The vast majority of things posted on all those sites are probably fine, but the nature of Safe Browsing's scans dings them for any bad apples it finds.
In fact, the problems the scans flag may already be fixed because Safe Browsing doesn't monitor in real time: According to the service's FAQ, webmasters can request their site be rescanned once problems have been dealt with, and the site's status will typically update within 24 hours if everything looks clean.