diff -r c0cb6bd10eec -r 1b0cfb4812d9 src/Tools/jEdit/src/jedit/Plugin.scala
--- a/src/Tools/jEdit/src/jedit/Plugin.scala	Tue Sep 15 18:14:28 2009 +0200
+++ b/src/Tools/jEdit/src/jedit/Plugin.scala	Tue Sep 15 19:01:16 2009 +0200
@@ -164,6 +164,5 @@
     // TODO: proper cleanup
     Isabelle.system = null
     Isabelle.plugin = null
-    scala.actors.Scheduler.shutdown()
   }
 }