diff --git a/config.py b/config.py
index e7d3732..4fb0571 100644
--- a/config.py
+++ b/config.py
@@ -73,7 +73,7 @@ conf.registerChannelValue(ChanTracker, 'keepOp',
     registry.Boolean(False, """bot stays opped"""))
 
 conf.registerChannelValue(ChanTracker, 'kickMode',
-    registry.CommaSeparatedListOfStrings("b", """bot will kick affected users when mode is triggered, use if with caution, if ops do something wrong be prepared, please report any bugs related"""))
+    registry.CommaSeparatedListOfStrings(['b'], """bot will kick affected users when mode is triggered, use if with caution, if ops do something wrong be prepared, please report any bugs related"""))
     
 conf.registerChannelValue(ChanTracker, 'kickMessage',
     registry.String("You are banned from this channel", """bot kick reason"""))
diff --git a/plugin.py b/plugin.py
index 148aead..2c7960a 100644
--- a/plugin.py
+++ b/plugin.py
@@ -366,9 +366,9 @@ class Ircd (object):
 		results.append('[%s][%s], %s sets +%s %s' % (channel,floatToGMT(begin_at),oper,kind,mask))
 		if not removed_at:
 			if begin_at == end_at:
-				results.append('setted forever')
+				results.append('set forever')
 			else:
-				results.append('setted for %s' % utils.timeElapsed(end_at-begin_at))
+				results.append('set for %s' % utils.timeElapsed(end_at-begin_at))
 				results.append('with %s more' % utils.timeElapsed(end_at-current))
 				results.append('ends at [%s]' % floatToGMT(end_at))
 		else:
@@ -801,7 +801,10 @@ class Chan (object):
 				# leave channel's users list management to supybot
 				ns = []
 				if self.name in self.ircd.irc.state.channels:
+					L = []
 					for nick in self.ircd.irc.state.channels[self.name].users:
+						L.append(nick)
+					for nick in L:
 						if nick in self.ircd.nicks:
 							n = self.ircd.getNick(self.ircd.irc,nick)
 							m = match(value,n)
@@ -1178,9 +1181,9 @@ class ChanTracker(callbacks.Plugin,plugins.ChannelDBHandler):
 	e = wrap(e,['op',commalist('something'),any('getTs'),rest('text')])
 	
 	def undo (self, irc, msg, args, channel, mode, items):
-		"""[<channel>] <nick|hostmask|*> [<nick|hostmask|*>]
+		"""[<channel>] <mode> <nick|hostmask|*> [<nick|hostmask|*>]
 
-		sets -q on them, if * found, remove them all"""
+		sets -<mode> on them, if * found, remove them all"""
 		b = self._removes(irc,msg,args,channel,mode,items)
 		if not msg.nick == irc.nick:
 			if b:
@@ -1291,7 +1294,10 @@ class ChanTracker(callbacks.Plugin,plugins.ChannelDBHandler):
 					targets.append(item)
 				elif channel in irc.state.channels and item in irc.state.channels[channel].users:
 					n = self.getNick(irc,item)
-					targets.append(getBestPattern(n)[0])
+					patterns = getBestPattern(n)
+					# when resync patterns may be empty, until the bot computed WHO
+					if len(patterns):
+						targets.append(patterns[0])
 		n = 0
 		for item in targets:
 			if i.add(irc,channel,mode,item,duration,msg.prefix,self.getDb(irc.network),self._logChan,False):
@@ -2264,5 +2270,3 @@ class ChanTracker(callbacks.Plugin,plugins.ChannelDBHandler):
 
 Class = ChanTracker
 
-
-# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79: