Output.FixInnerHTML TYPE: bool VERSION: 4.3.0 DEFAULT: true --DESCRIPTION--
  If true, HTML Purifier will protect against Internet Explorer's
  mishandling of the innerHTML attribute by appending
  a space to any attribute that does not contain angled brackets, spaces
  or quotes, but contains a backtick.  This slightly changes the
  semantics of any given attribute, so if this is unacceptable and
  you do not use innerHTML on any of your pages, you can
  turn this directive off.