You forgot to tell us your opinion on Obama. When you hijack a thread to rant about your dislike for afkers, you should always take an opportunity to educate everyone on you political views.
As opposite to simply reply on topic.
DC in arena means disconnecting just before it start (during loading screen, usually) or in the middle or the fight. It's usually rare and can't be solved, as apparently is just disconnecting from the game, and is not specific of arena. If after joining the arena you get a weird landscape with running numbers, it's wise to unlog as you are messing with the game for player actually in arena. Luckily it rare, still less than...
Crashing post arena. This is quite common, players reports it as few as one in a ten matches, and as much as every other one. In monster arena is pretty common and you can reduce it by unequiping your weapon before returning to Aven (or where you were before joining). Happens in 3v3, but much less. Unequiping weapons do nothing to avoid crash in 3v3.
Alternate Eden Eternal client download: http://www.onrpg.com/MMO/Eden-Eternal