I installed a new Jetpack comment function a few days ago, fearing no evil as I’m perfectly happy with the other Jetpack functions running on my blog. But after installing this I totally stopped getting comments. Apparently it ate them instead of forwarding them to the blog. When I tried to log out and try a comment myself I got stopped in the blog host firewall and had to contact support to be allowed back in.
Needless to say the Jetpack comment function got deactivated and now everything is back to normal. But, any comments made in the meantime are gone, and I’ve no idea where they are. Sorry about that.