--- Slim/Formats/XML.pm.original	2015-08-31 04:04:29.000000000 +0100
+++ Slim/Formats/XML.pm	2015-09-01 00:30:03.000000000 +0100
@@ -657,7 +657,8 @@
 	my $timeout = preferences('server')->get('remotestreamtimeout') * 2;
 
 	# Bug 3510 - check for bogus content.
-	if ($$content !~ /<\??(?:xml|rss)/) {
+	# We expect to find <?xml, <rss, or <opml at the start of the document.
+	if ($$content !~ /<\??(?:xml|rss|opml)/) {
 
 		# Set $@, so the block below will catch it.
 		$@ = "Invalid XML feed\n";