Index: Slim/Web/Settings/Player/Audio.pm
===================================================================
--- Slim/Web/Settings/Player/Audio.pm	(revision 15851)
+++ Slim/Web/Settings/Player/Audio.pm	(working copy)
@@ -90,9 +90,9 @@
 			if ($pref eq 'synchronize') {
 			
 				if (my $otherClient = Slim::Player::Client::getClient($paramRef->{$pref})) {
-					Slim::Player::Sync::sync($client, $otherClient);
+					$client->execute( ['sync', $otherClient->id()] );
 				} else {
-					Slim::Player::Sync::unsync($client);
+					$client->execute( ['sync', '-'] );
 				}
 			
 			} else {
Index: Slim/Buttons/Synchronize.pm
===================================================================
--- Slim/Buttons/Synchronize.pm	(revision 15851)
+++ Slim/Buttons/Synchronize.pm	(working copy)
@@ -140,9 +140,9 @@
 		my @oldlines = $client->curLines();
 	
 		if (Slim::Player::Sync::isSyncedWith($client, $selectedClient) || ($client eq $selectedClient)) {
-			Slim::Player::Sync::unsync($client);
+			$client->execute( ['sync', '-'] );
 		} else {
-			Slim::Player::Sync::sync($client, $selectedClient);
+			$client->execute( ['sync', $selectedClient->id()] );
 		}
 
 		$client->pushLeft(\@oldlines, $client->curLines());