Index: api/SMWWriter_API.php
===================================================================
--- api/SMWWriter_API.php	(revision 68602)
+++ api/SMWWriter_API.php	(working copy)
@@ -44,7 +44,7 @@
 		$remove = $params['remove'];
 		$flags = $params['flags'];
 		$summary = $params['summary'];
-
+        echo "<h1>Title: " . $params['title'] . "</h1>"; // TODO: Remove
 		$titleObj = Title::newFromText($params['title']);
 		if(!$titleObj || $titleObj->isExternal())
 			$this->dieUsageMsg(array('invalidtitle', $params['title']));
Index: api/SMWWriter.php
===================================================================
--- api/SMWWriter.php	(revision 68602)
+++ api/SMWWriter.php	(working copy)
@@ -79,7 +79,7 @@
 		$count = count( $values );
 		$without = null;
 		for ( $i = 0; $i < $count; $i++ )
-			if ($values[$i]->getHash() === $value->getHash()) {
+			if ($values[$i] != '' && $values[$i]->getHash() === $value->getHash()) {
 				unset( $this->data[$propertyname][$i] );
 				break;
 			}
@@ -120,11 +120,11 @@
 	public function copySemanticData( SMWSemanticData $data ) {
 		$properties = $data->getProperties();
 		foreach ( $properties as $property ) {
-			if ( $property->isUserDefined() ) {
+			// if ( $property->isUserDefined() ) { // TODO: Check with Denny what to do with this // SHL
 				$values = $data->getPropertyValues($property);
 				foreach ( $values as $value )
 					$this->addPropertyValue($property, $value);
-			}
+			// } // TODO: Check with Denny what to do with this // SHL
 		}
 	}
 	
@@ -506,12 +506,12 @@
 	 * @return boolean true if everything is OK
 	 */
 	private function checkSubject(Title $remove, Title $add) {
-		if ( !$add->equals($this->title) ) return false;
-		if ( $remove->exists() ) {
-			if ( !$remove->equals($this->title) ) return false;
-		} else {
-			$this->nosubject = true;
-		}
+	    // TODO: Check how this one should look
+	    if ( $remove->exists() ) {
+	        if ( !$remove->equals($this->title) ) return false; // TODO: Check with Denny what to do with this
+	    } else {
+	        if ( !$add->equals($this->title) ) return false;
+	    }
 		return true;
 	}