HTML5 bad for WYSIWYG editors? Posted on November 26, 2009 by Karl CMS and blogging software engineers might have a hard task ahead of them trying to support HTML5. (via Shelley Powers). Share this:Click to email this to a friend (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to print (Opens in new window)