diff -urp ../xine-lib-1.1.4.orig/src/xine-engine/load_plugins.c ./src/xine-engine/load_plugins.c
--- ../xine-lib-1.1.4.orig/src/xine-engine/load_plugins.c	2007-01-19 00:30:18.000000000 +0100
+++ ./src/xine-engine/load_plugins.c	2007-01-30 19:04:56.000000000 +0100
@@ -2366,9 +2366,19 @@ char *xine_get_file_extensions (xine_t *
   plugin_node_t    *node;
   char             *str;
   int               list_id, list_size;
+  int               havempgdecoder = 0;
+  const char * const * p;
 
   pthread_mutex_lock (&catalog->lock);
 
+  _build_list_typed_plugins(&catalog, catalog->plugin_lists[PLUGIN_AUDIO_DECODER - 1]);
+  for (p = catalog->ids; p && *p; p++) {
+    if (strcmp (*p, "mad") == 0 || strcmp (*p, "ffmpegaudio") == 0) {
+      havempgdecoder = 1;
+      break;
+    }
+  }
+
   /* calc length of output */
 
   len = 0; 
@@ -2382,7 +2392,8 @@ char *xine_get_file_extensions (xine_t *
 
       cls = (demux_class_t *)node->plugin_class;
 
-      if((exts = cls->get_extensions(cls)) && *exts)
+      if((exts = cls->get_extensions(cls)) && *exts &&
+	 (havempgdecoder || !strstr (exts, "mp3")))
 	len += strlen(exts) + 1;
     }
   }
@@ -2402,7 +2413,8 @@ char *xine_get_file_extensions (xine_t *
 
       cls = (demux_class_t *)node->plugin_class;
 
-      if((e = cls->get_extensions (cls)) && *e) {
+      if((e = cls->get_extensions (cls)) && *e &&
+	 (havempgdecoder || !strstr (e, "mp3"))) {
 	l = strlen(e);
 	memcpy (&str[pos], e, l);