--- a/mercurial/bookmarks.py	Thu Jun 09 10:15:24 2011 +1000
+++ b/mercurial/bookmarks.py	Wed Jun 08 21:25:18 2011 +0800
@@ -114,7 +114,7 @@
     wlock = repo.wlock()
     try:
         file = repo.opener('bookmarks.current', 'w', atomictemp=True)
-        file.write(mark)
+        file.write(encoding.fromlocal(mark))
         file.rename()
     finally:
         wlock.release()