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 9f87121..92dde58 100644
--- a/IPython/Extensions/jobctrl.py
+++ b/IPython/Extensions/jobctrl.py
@@ -133,20 +133,33 @@ 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
     else:
         use_shell = False
 
-    p = Popen(cmd,shell = use_shell)
-    jobentry = 'tasks/t' + str(p.pid)
-    
+    jobentry = None
     try:
+        try:
+            p = Popen(cmd,shell = use_shell)
+        except WindowsError:
+            if use_shell:
+                # try with os.system
+                os.system(cmd)
+                return
+            else:
+                # have to go via shell, sucks
+                p = Popen(cmd,shell = True)
+            
+        jobentry = 'tasks/t' + str(p.pid)
         ip.db[jobentry] = (p.pid,cmd,os.getcwd(),time.time())
-        p.communicate()
+        p.communicate()        
+
     finally:
-        del ip.db[jobentry]
+        if jobentry:
+            del ip.db[jobentry]
 
 
 def install():