Thanks for all the info, Stephen. Deleting and replacing the plugin did the trick. We’re not sure why the forum stopped showing posts dated after December 16, but at least it seems to be up and going again.
I have the same issue. The sidebar is cutting off all the RH text of people’s forum posts plus hiding the all-important Submit button. What were once very robust forums in Drupal are now dead in the water in WordPress due to this issue.
I want all the forum pages and posts to be full-width, like the main forums page where I placed the short code. I’m willing to pay someone to help resolve this, since I don’t know how to do coding or create child themes, and can’t use the Genesis plugin since I’m not using a Genesis framework. Any links anyone can point to for help? Thanks. (By the way I now see that this very forum suffers a bit from the same issue—the message box is cut off on the right and the green Submit button is partially cut off—but at least people can see it.)