Index: Slim/Buttons/RemoteTrackInfo.pm
===================================================================
--- Slim/Buttons/RemoteTrackInfo.pm	(revision 14491)
+++ Slim/Buttons/RemoteTrackInfo.pm	(working copy)
@@ -72,7 +73,7 @@
 				my $client = shift;
 
 				my $index = $client->modeParam('favorite');
-				if ($index) {
+				if (defined $index) {
 					return "{FAVORITES_FAVORITE_NUM}$index {FAVORITES_RIGHT_TO_DELETE}";
 				} else {
 					return "{FAVORITES_RIGHT_TO_ADD}";
@@ -84,7 +85,7 @@
 				my $favorites = Slim::Utils::Favorites->new($client) || return;
 				my $index = $client->modeParam('favorite');
 
-				if ($index) {
+				if (defined $index) {
 					$favorites->deleteIndex($index);
 					$client->modeParam('favorite', undef);
 					$client->showBriefly( {
Index: Slim/Plugin/Favorites/OpmlFavorites.pm
===================================================================
--- Slim/Plugin/Favorites/OpmlFavorites.pm	(revision 14491)
+++ Slim/Plugin/Favorites/OpmlFavorites.pm	(working copy)
@@ -188,7 +188,8 @@
 
 	$url =~ s/\?sessionid.+//i;	# Bug 3362, ignore sessionID's within URLs (Live365)
 
-	if (my $index = $class->{'urlindex'}->{ $url }) {
+	my $index = $class->{'urlindex'}->{ $url };
+	if (defined $index) {
 
 		$log->info("Match $url at index $index");