I have found a bug related to battles, on PS.
I have a ladder account, Chime-Ladder, which is registered, yet whenever I finish a battle, since I registered it during a previous battle, it always shows me the Register an account to protect your ladder rating message:
http://prntscr.com/8vu42a
In that Screenshot, you can see the message, and the change password / logout, and a Mod, Jin Of The Gale, Confirmed that that account was indeed registered.
I tried refreshing, and after 2 refreshes, it worked, and the message disapeared.
This isn't a major bug, it's just a visual one, as the rating is indeed saved, even after refreshing, but I just thought i would point this out.