My script works in IE 6, but not FF 2

My script works in IE 6, but not FF 2


My page http://www.twinflamingos.com/chris/chris.htm works find in IE
6, but FF 2 returns an error pointing to jquery. Specifically:
Error: [Exception... "Could not convert JavaScript argument"
nsresult: "0x80570009 (NS_ERROR_XPC_BAD_CONVERT_JS)" location: "JS
frame :: http://jqueryjs.googlecode.com/files/jquery-1.2.6.js ::
anonymous :: line 871" data: no]
Source File: http://jqueryjs.googlecode.com/files/jquery-1.2.6.js
Line: 871
I used the uncompressed version to see what line the error is coming
from, but frankly I don't understand enough for it to do me any good.
Both my html and css validate using W3C validators.
Is it my code? Or is there something in Jquery?
If this is the wrong forum/list/group then please point me to the
correct one. This is my first project with jQuery and I am also
relatively new to javascript in general. One of the main reasons I am
using jQuery is to avoid the cross-browser problems.
Have I missed the boat on something, or is this a generic issue?
Thanks,
Larry Ludwick