Well we all know that we are taking our hike into renewal and we are required to use 2011 or 2012 clients so we can support the updates of rAthena but then thinking of perfection of this renewal system we can't be one of, if this will still exist in client issue:
http://www.eathena.ws/board/index.php?showtopic=253559&hl=hexed
should be taken into consideration.
It's annoying that if you have entered a wrong password client will crash or stop, same with relogging or using another account.