diff -r 4e8b73151209 web.jsf.editor/src/org/netbeans/modules/web/jsf/editor/facelets/FaceletsLibrarySupport.java
--- a/web.jsf.editor/src/org/netbeans/modules/web/jsf/editor/facelets/FaceletsLibrarySupport.java	Thu Jan 14 16:31:01 2010 +0100
+++ b/web.jsf.editor/src/org/netbeans/modules/web/jsf/editor/facelets/FaceletsLibrarySupport.java	Thu Jan 14 17:02:51 2010 +0100
@@ -38,6 +38,8 @@
  */
 package org.netbeans.modules.web.jsf.editor.facelets;
 
+import java.io.IOException;
+import java.util.Enumeration;
 import org.netbeans.modules.web.jsf.editor.facelets.mojarra.FaceletsTaglibConfigProcessor;
 import com.sun.faces.config.DocumentInfo;
 import com.sun.faces.spi.ConfigurationResourceProvider;
@@ -222,8 +224,27 @@
                 Exceptions.printStackTrace(ex);
             }
         }
-        
-        ClassLoader proxyLoader = new URLClassLoader(urlsToLoad.toArray(new URL[]{}), originalLoader);
+
+        ClassLoader proxyLoader = new URLClassLoader(urlsToLoad.toArray(new URL[]{}), originalLoader) {
+
+            @Override
+            public URL findResource(String name) {
+                // we don't want to plug external services to our runtime
+                if (name.startsWith("META-INF/services")) { // NOI18N
+                    return null;
+                }
+                return super.findResource(name);
+            }
+
+            @Override
+            public Enumeration<URL> findResources(String name) throws IOException {
+                // we don't want to plug external services to our runtime
+                if (name.startsWith("META-INF/services")) { // NOI18N
+                    return Collections.enumeration(Collections.<URL>emptyList());
+                }
+                return super.findResources(name);
+            }
+        };
 
         try {
             Thread.currentThread().setContextClassLoader(proxyLoader);