Hopefully now all calls to escape() are replaced with ajaxEscape() in response to Tomasz's forum post; remove deprecated version of show_category_info() from functions.php
/* This class restores all CSS properties to that absolute positioning of fullscreen mode is correct */.mceFullscreenPos { display: block !important; position: static !important; left: 0 !important; top: 0 !important; bottom: auto !important; right: auto !important; width: auto !important; height: auto !important; margin: 0 !important; padding: 0 !important; border: 0 !important; overflow: visible; z-index: 1 !important; clear: both;}body.mceFullscreen { overflow: hidden !important;}