MapleStory behaving strangely

I get this on XP in JMS too..

I couldn't talk at all at HT after the Wings died, plus when my JP friend asked me about the Mass Seduce in HT and if I know it, I couldn't reply to it because I couldn't type anything

I tried what was said above to try to fix it, but no dice..

Holding Alt and AltGr for a few seconds fix it for me 9/10 times. I'm to lazy to see if that has already been mentioned earlier in the thread.