diff --git a/IPython/Extensions/ipy_leo.py b/IPython/Extensions/ipy_leo.py
index cd9028e..2cbc260 100644
--- a/IPython/Extensions/ipy_leo.py
+++ b/IPython/Extensions/ipy_leo.py
@@ -19,7 +19,7 @@ def init_ipython(ipy):
     """
     global ip
     ip = ipy
-    ip.set_hook('complete_command', mb_completer, str_key = 'mb')
+    ip.set_hook('complete_command', mb_completer, str_key = '%mb')
     ip.expose_magic('mb',mb_f)
     ip.expose_magic('lee',lee_f)
     ip.expose_magic('leoref',leoref_f)
diff --git a/IPython/Extensions/jobctrl.py b/IPython/Extensions/jobctrl.py
index 343a571..92dde58 100644
--- a/IPython/Extensions/jobctrl.py
+++ b/IPython/Extensions/jobctrl.py
@@ -133,6 +133,7 @@ else:
 
 def jobctrl_shellcmd(ip,cmd):
     """ os.system replacement that stores process info to db['tasks/t1234'] """
+    cmd = cmd.strip()
     cmdname = cmd.split(None,1)[0]
     if cmdname in shell_internal_commands:
         use_shell = True