[jQuery] IE 6 Invalid Character Error When Thickbox is Opened

[jQuery] IE 6 Invalid Character Error When Thickbox is Opened


Has anyone else seen this error before in IE6?
Line: 1
Char: 120
Error: Invalid Character
Code: 0
When I open a thickbox I see there's an error in the lower left hand
corner of the browser. Clicking that shows the error message above.
What causes this error and how do you make it go away? There's no
error in Firefox or IE 7.