NPE when a user is given +a

[packetcollision]

11:56:52 [INFO] [MonsterIRC] <#minecraft>: ChanServ gave mode +a to  ZeDestructor ZeDestructor.  
11:56:52 [INFO] <#minecraft>: ChanServ gave mode +a to  ZeDestructor ZeDestructor.  
11:56:52 [SEVERE] java.lang.NullPointerException  
11:56:52 [SEVERE]       at org.monstercraft.irc.plugin.managers.listeners.IRCEventListener.onMode(IRCEventListener.java:101)  
11:56:52 [SEVERE]       at org.monstercraft.irc.ircplugin.event.events.PluginModeEvent.dispatch(PluginModeEvent.java:31)  
11:56:52 [SEVERE]       at org.monstercraft.irc.ircplugin.event.EventMulticaster.fireEvent(EventMulticaster.java:114)  
11:56:52 [SEVERE]       at org.monstercraft.irc.ircplugin.event.EventMulticaster.fireEvent(EventMulticaster.java:98)  
11:56:52 [SEVERE]       at org.monstercraft.irc.ircplugin.event.EventManager.processEvent(EventManager.java:67)  
11:56:52 [SEVERE]       at org.monstercraft.irc.ircplugin.event.EventManager.run(EventManager.java:181)  
11:56:52 [SEVERE]       at java.lang.Thread.run(Thread.java:722)  

Seems to only happen since the v1.73 update.