There seems to be a problem with the markup in Voting/Experience System - at least in my versions of Firefox (48.0.1) and Vivaldi (1.3.551.38). At the bottom of the page below the "Return to the PerlMonks FAQ" link there is a second table of Monk levels and then what appears to be a JavaScript snippet is displayed. The main page content is not closed properly because the usual right sidebar is included in the main part at the very end.