First, at its activation from a blog have disappeared sidebar, footer and the panel of administration WordPress (which above).
Secondly, the plug-in jQuery Comment Preview and script which form was about the form for comments has ceased to work.
Thirdly, though it is noted checkbox «to Use HTML letters», letters all the same come in the form of a plain text.
But it still florets. Here berries: deactivation and plug-in removal haven't helped restoration sidebar, footer and panels WP. No less than work a plug-in and a script.
What happiness that I experimented a plug on local computer!