Commenting
Yesterday, in discussion with our hosting company we learned that the way we have been doing comments was creating some significant back end problems that would have substantially driven up costs. The interim solution to this was to delete the backlog of 1.6 million WordPress comments, most of which had already been migrated over to Disqus. This seems, as a side effect, to have broken the system that allowed folks to login to Disqus with LGM credentials.
We are now checking on whether functionality can be restored.