Index: Importer.pm
===================================================================
--- Importer.pm	(revision 24296)
+++ Importer.pm	(working copy)
@@ -294,7 +294,15 @@
 			# Convert $track->url to a path and call MusicIP
 			my $path = Slim::Utils::Misc::pathFromFileURL($trackurl);
 
-			my $pathEnc = Slim::Utils::Misc::escape($path);
+			# take care that MusicIP API will understand paths on Windows too
+			# TODO: someone please check if this breaks Linux or MacOS
+			my $pathEnc = Slim::Utils::Unicode::utf8on($path);
+			if ($isWin) {
+				$pathEnc = URI::Escape::uri_escape($pathEnc);
+			} else {
+				$pathEnc = Slim::Utils::Misc::escape($pathEnc);
+			}
+			$pathEnc = Slim::Utils::Unicode::utf8encode_locale($pathEnc);
 
 			# Set musicmagic_mixable on $track object and call $track->update to actually store it.
 			my $result = get("http://$MMSHost:$MMSport/api/status?song=$pathEnc");