Colorbox creates overlay over entire site off-line (maintenance mode) page

ColorBox v1.3.18

<div id="cboxOverlay" style="opacity: 0.75; cursor: pointer; "></div>

"Extra settings" are disabled.

The opacity matches that of the current style and opacity option in the settings.

clicking on the screen removes the overlay.

It creates a colorbox where there are no colorbox images.

The only image is the theme's logo: sites/default/files/logo.png

<div id="colorbox" class="" style="padding-bottom: 20px; padding-right: 0px; position: absolute; width: 610px; height: 460px; top: 0px; left: 207px; display: block; "><div id="cboxWrapper" style="width: 10px; height: 30px; "><div><div id="cboxTopLeft" style="float: left; "></div><div id="cboxTopCenter" style="float: left; width: 610px; "></div><div id="cboxTopRight" style="float: left; "></div></div><div style="clear: left; "><div id="cboxMiddleLeft" style="float: left; height: 460px; "></div><div id="cboxContent" style="float: left; width: 610px; height: 460px; "><div id="cboxLoadedContent" style="width: 0px; height: 0px; overflow-x: hidden; overflow-y: hidden; float: left; "></div><div id="cboxLoadingOverlay" style="float: left; height: 460px; "></div><div id="cboxLoadingGraphic" style="float: left; height: 460px; "></div><div id="cboxTitle" style="float: left; display: none; "></div><div id="cboxCurrent" style="float: left; display: none; "></div><div id="cboxNext" style="float: left; display: none; "></div><div id="cboxPrevious" style="float: left; display: none; "></div><div id="cboxSlideshow" style="float: left; display: none; "></div><div id="cboxClose" style="float: left; ">Close</div></div><div id="cboxMiddleRight" style="float: left; height: 460px; "></div></div><div style="clear: left; "><div id="cboxBottomLeft" style="float: left; "></div><div id="cboxBottomCenter" style="float: left; width: 610px; "></div><div id="cboxBottomRight" style="float: left; "></div></div></div><div style="position: absolute; width: 9999px; visibility: hidden; display: none; "></div></div>

jquery.colorbox.js has error:
Uncaught TypeError: Object #

$('.' + boxElement, document).live('click', function (e) {