Worst title in the world, but I'm not sure what to call it! This is probably the most minor of minor bugs but here it is anyways. After you log off the game and close it, a little box shows up and normally has maple stuff in it (upcoming update info, upcoming events, etc) and it's blank! Also, after I sit still for a couple minutes (whether I'm alt tabbed or not) my player can no longer attack or go through portals. I can, however, still move and open all my tabs (inventory, skills, stats, etc). I have to change channels to be able to do anything! This bug is also minor, as changing channels is easy, but it does get annoying!
Hahahaha, worst title in the world but gets to the point. That is an advertisement, I know for some games they have an advertisement file like for Vindictus the file is called "_usa_AdBalloonExt" and you can delete it so that the window never appears again. However, I do not see anything of the sorts for Maple so I guess just have to deal with it. Once you close the game you can just press escape and it closes. Also the second paragraph Chels is talking about happens a lot. For example, scrolling when in Sleepywood does not work so when you are in Sleepywood and use a Henesys scroll it doesn't work and as a result your character can no longer use skills and stuff but it can jump walk and use portals. Also, if you try entering a portal that has no purpose or does not work, the same thing happens.