diff -dur sync.orig/named_condition.hpp sync/named_condition.hpp
--- sync.orig/named_condition.hpp	2008-10-13 15:36:00.000000000 +0900
+++ sync/named_condition.hpp	2009-02-05 15:57:50.437500000 +0900
@@ -300,7 +300,7 @@
 {
    if (!lock)
       throw lock_exception();
-   this->condition()->do_wait(*lock.mutex()->mutex());
+   this->condition()->do_wait(*lock.mutex());
 }
 
 template <typename L, typename Pr>
@@ -310,7 +310,7 @@
       throw lock_exception();
 
    while (!pred())
-      this->condition()->do_wait(*lock.mutex()->mutex());
+      this->condition()->do_wait(*lock.mutex());
 }
 
 template <typename L>