[Plugin: Shadowbox JS] IE7 errors with Shadowbox

When I have Shadowbox JS activated, I get an error on every page (even pages that have no videos on them). It’s one of those errors that shows up on the status line of IE7, and when I click for details it says:

Problems with this web page might prevent it from being displayed properly or functioning properly... 

Line: 6
Char: 1913
Error: 'J.parentNode' is null or not an object
Code: 0
URL: (any url from my site -- www.invisibleshoe.com)

I had a user call today reporting a different error:

A website wants to open web content using a program on your computer. This program does not have a valid digital signature that verifies its publisher...
Name: c:\program files\quicktime\qttask.exe

If I disable the plug-in these errors disappear.

Thoughts? Solutions?

Thanks!