What browser are you using? working fine for me, i've got 4.5LTC and just put another 10PPC in there right now.
I'm on Chrome and FF, both working fine (login, change pw, affiliate, etc all works). Been flawless for me right now hence why i've been using it. I usually don't use sites with bugs or shitty functionality.
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:36.0) Gecko/20100101 Firefox/36.0
Maybe its just my browser. Who knows.