Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/AbstractTMSTileSource.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/AbstractTMSTileSource.java	(revision 31123)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/AbstractTMSTileSource.java	(revision 31124)
@@ -134,6 +134,10 @@
             for (Entry<String, String> searchEntry: noTileHeaders.entrySet()) {
                 List<String> headerVals = headers.get(searchEntry.getKey());
-                if (headerVals != null && headerVals.contains(searchEntry.getValue())) {
-                    return true;
+                if (headerVals != null) {
+                    for (String headerValue: headerVals) {
+                        if (headerValue.matches(searchEntry.getValue())) {
+                            return true;
+                        }
+                    }
                 }
             }