Hey just though I'd drop this in here in case the developer of this plugin or anyone else is interested in making this plugin HTML5 compliant:
I realize that the W3C validator for HTML5 is still experimental but nonetheless I feel there's no harm in improving the script this way. The error produced is outlined in the HTML5 specs and will most likely always be invalid.
The specific error the validator throws up is:
"“& did not start a character reference”"
Best of luck!