Metadata is double-escaped

e.g. apostrophe in node title is output in block as '

A quick look at the code suggests that the issue arises because creativecommons.class.php calls get_rdf() that in turn calls check_metadata() that sanitises the metadata values in place. These are later re-sanitised when used via @ placeholders in get_html().

My suggestion is to drop check_metadata() and output the rdf via standard Drupal placeholders.