Index: /trunk/src/org/openstreetmap/josm/data/imagery/WMSCachedTileLoader.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/imagery/WMSCachedTileLoader.java	(revision 14261)
+++ /trunk/src/org/openstreetmap/josm/data/imagery/WMSCachedTileLoader.java	(revision 14262)
@@ -34,5 +34,7 @@
 
         super(listener, cache, options);
-        setDownloadExecutor(TMSCachedTileLoader.getNewThreadPoolExecutor("WMS-downloader-%d", THREAD_LIMIT.get()));
+        // use WMS specific maximum number of download threads and use the same value for concurrent downloads per host
+        // for each layer use separate thread pool so the limit set in preferences is per imagery
+        setDownloadExecutor(TMSCachedTileLoader.getNewThreadPoolExecutor("WMS-downloader-%d", THREAD_LIMIT.get(), THREAD_LIMIT.get()));
     }