miramon, who like me stopped being able to see comments yesterday, went into Profile/Settings/Display/Site Scheme and set the viewing scheme from XColibur (where it had been forever, I think) to Horizon (Site Default). That fixed the "can't see comments" issue; however, the XColibur viewing option also then disappears from the screen when you reload it, so you can never get it back. I guess that's the fix, then.