diff --git a/common.py b/common.py
index a4423e2..4123560 100644
--- a/common.py
+++ b/common.py
@@ -32,36 +32,21 @@ def logger(severity, message):
 	sys.stderr.write('%s %s %s: %s\n' % args)
 
 def conf_save(obj):
+	if conf('persistent_locked'):
+		return False
+
+	set_conf('persistent_locked', True)
+
 	with open(conf('persistent_storage'), 'wb') as fd:
 		return pickle.dump(obj, fd)
 
+	set_conf('persistent_locked', False)
+
 def conf_load():
 	with open(conf('persistent_storage'), 'rb') as fd:
 		fd.seek(0)
 		return pickle.load(fd)
 
-def levenshtein(a, b, return_table=False):
-	'''returns the levenshtein distance between a and b'''
-	# initialisize a table with 0, but the 0-rows/cols with their index
-	d = [[(i if 0 == j else j if 0 == i else 0) for j in range(len(b)+1)] for i in range(len(a)+1)]
-
-	i = j = 0
-	for i in range(1, len(a)+1):
-		for j in range(1, len(b)+1):
-			if a[i-1] == b[j-1]:
-				d[i][j] = d[i-1][j-1]
-			else:
-				d[i][j] = min(
-					d[i-1][j] + 1,    # deletion
-					d[i][j-1] + 1,    # insertion
-					d[i-1][j-1] + 1,  # substitution
-				)
-
-	if return_table:
-		return (d, d[i][j])
-	else:
-		return d[i][j]
-
 def get_version_git():
 	import subprocess
 
diff --git a/local_config.py.skel b/local_config.py.skel
index 71c27c2..3b79229 100644
--- a/local_config.py.skel
+++ b/local_config.py.skel
@@ -31,6 +31,7 @@ config = {
 	'request_counter': 0,
 
 	'persistent_storage': 'urlbot.persistent',
+	'persistent_locked': False,
 
 	'url_blacklist': [
 		r'^.*heise\.de/[^/]+/meldung/.*$',
diff --git a/plugins.py b/plugins.py
index 5e37c9d..4885114 100644
--- a/plugins.py
+++ b/plugins.py
@@ -626,10 +626,7 @@ def event_trigger():
 
 	now = time.time()
 
-	i = 0
-	for (t, callback, args) in joblist:
+	for (i, (t, callback, args)) in enumerate(joblist):
 		if t < now:
 			callback(*args)
 			del(joblist[i])
-
-		i += 1
diff --git a/urlbot.py b/urlbot.py
index 8b575e8..ca9c493 100755
--- a/urlbot.py
+++ b/urlbot.py
@@ -245,6 +245,7 @@ class bot(ClientXMPP):
 
 		self.add_event_handler('session_start', self.session_start)
 		self.add_event_handler('groupchat_message', self.muc_message)
+		self.add_event_handler('message', self.message)
 
 	def session_start(self, event):
 		self.get_roster()
@@ -264,6 +265,12 @@ class bot(ClientXMPP):
 
 		return handle_msg(msg_obj)
 
+	def message(self, msg_obj):
+		if 'groupchat' == msg_obj['type']:
+			return
+
+		print('msg from %s: %s' % (msg_obj['from'].bare, msg_obj['body']))
+
 if '__main__' == __name__:
 	import plugins