It’s not just you: Facebook’s sharing system is messed up.
As noted by ZDNet, Facebook’s security systems are blocking a bunch of high profile publications from being shared on the network, marking them as unsafe. This mainly involves the sharing features on third-party sites, such as clicking the share to Facebook button on this page (although we seem to be unaffected).
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On the other hand, sharing directly to your profile or timeline on Facebook.com works fine.
Furthermore, not all users were affected. My colleague was able to replicate the issue, but I seem to be unaffected no matter what site I try to share from.
Facebook’s own status dashboard shows all systems are a go, but clearly there are some issues around. We’ve contacted Facebook for more information and will update this post when we hear back.
Update 12:41 PM ET – The issue appears to be resolved: