Don't add empty property parameters.

apps/contacts/ajax/contact/addproperty.php

@@ -141,13 +141,17 @@ foreach ($parameters as $key=>$element) {
 		// And it probably shouldn't be done here anyways :-/
 		foreach($element as $e) {
 			if($e != '' && !is_null($e)) {
+				if(trim($e)) {
 					$vcard->children[$line]->parameters[] = new Sabre_VObject_Parameter($key, $e);
 				}
 			}
+		}
 	} else {
+		if(trim($element)) {
 			$vcard->children[$line]->parameters[] = new Sabre_VObject_Parameter($key, $element);
 		}
 	}
+}
 $checksum = md5($vcard->children[$line]->serialize());
 
 if(!OC_Contacts_VCard::edit($id, $vcard)) {

apps/contacts/ajax/contact/saveproperty.php

@@ -133,13 +133,16 @@ if(!$value) {
 					debug('Adding parameter: '.$key);
 					if(is_array($parameter)) {
 						foreach($parameter as $val) {
+							if(trim($val)) {
 								debug('Adding parameter: '.$key.'=>'.$val);
 								$vcard->children[$line]->add(new Sabre_VObject_Parameter(
 									$key,
 									strtoupper(strip_tags($val)))
 								);
 							}
+						}
 					} else {
+						if(trim($parameter)) {
 							$vcard->children[$line]->add(new Sabre_VObject_Parameter(
 								$key,
 								strtoupper(strip_tags($parameter)))
@@ -147,6 +150,7 @@ if(!$value) {
 						}
 					}
 				}
+			}
 			break;
 		default:
 			debug('Setting string:'.$name.' '.$value);