Fixed!

plugins/Scheduler.py

@@ -127,10 +127,12 @@ class Scheduler(callbacks.Privmsg):
         try:
             id = int(id)
         except ValueError:
-            irc.error(msg, 'Invalid event id: %r' % id)
-            return
-        schedule.removeEvent(id)
-        irc.reply(msg, conf.replySuccess)
+            pass
+        try:
+            schedule.removeEvent(id)
+            irc.reply(msg, conf.replySuccess)
+        except KeyError:
+            irc.error(msg, 'Invalid event id.')
 
     def repeat(self, irc, msg, args):
         """<name> <seconds> <command>

src/callbacks.py

@@ -296,7 +296,7 @@ class IrcObjectProxy:
         log.debug('IrcObjectProxy.__init__: %s' % args)
         self.irc = irc
         self.msg = msg
-        self.args = args
+        self.args = args[:]
         self.counter = 0
         self.to = None
         self.action = False