WordPress requested URL ‘/$’ error
If you recently updated your WordPress installation, you may see the following error when trying to post a comment: “The requested URL ‘/$’ was not found on this server. “
If you see this error, relax… it is likely just a plugin that is not compatible with your new version of WordPress. To fix the problem, simply update all of your plugins to their latest versions, then try posting a comment again. The problem should be resolved.