This is an old error which has beein causing significant developer pain through the years.  Here’s what is basically boils down to

If there are any Javascript scripts running inside the body tag or inside a table which is directly a child of body, then most of the time this error is bound to happen. The solution is to move the script to the top or bottom of the body tag or even moving it after the body. The script can also be put inside a function and then calling it from window.onload     Another solution to this problem is to add defer=”defer” in the script tag.

More info here http://support.microsoft.com/kb/927917