--- a/mercurial/commands.py	Sat May 05 15:30:54 2012 -0500
+++ b/mercurial/commands.py	Thu Oct 18 22:33:58 2012 +0200
@@ -850,7 +850,6 @@
         if not inactive and cur == marks[mark]:
             bookmarks.setcurrent(repo, mark)
         bookmarks.write(repo)
-        return
 
     else: # mark is None
         if len(marks) == 0: