The load-method of the InfModel doesn't work. The following simple code throws a fatal error:
$infModel= ModelFactory::getInfModelF('http://[...]/annotations.owl#');
$infModel->load(OWL_DIR . 'annotations.owl');
Here's the output:
Fatal error: RDFAPI error (class: Statement; method: new): Resource expected as subject. in /[...]/ext/rdf_api/model/Statement.php on line 56
With any other model, it works.