I've noticed that there seems to be a problem dealing with spaces, converted to %C2%A0 when sent to http://qcrumb.com.
As example, this query does not work:
SELECT ?depiction WHERE {?x <http://bio2rdf.org/taxonomy_resource:depiction> ?depiction . }
but this works:
SELECT?depiction WHERE {?x <http://bio2rdf.org/taxonomy_resource:depiction>?depiction . }