The first reply at http://groups.google.com/group/clojure/browse_thread/thread/3...

		cjenkins on Sept 22, 2009 \| parent \| context \| favorite \| on: Learning Clojure with Project Euler The first reply at http://groups.google.com/group/clojure/browse_thread/thread/... goes into pretty good detail from the language designer. The short version is that it's a limitation in the JVM currently that he's hoping is removed some day.