I've got another issue now with brain keys that may be a related problem.
I've got an account I created 4 months ago around the launch of OL.
I have access to the account, no problem in the light-wallet.
If I want to backup the brain key, It is not possible.
I select backup brain key, enter my password, it shows me the brain key, I copy this and click verify.
In pasting the brain key back in, tells me "Brainkey does not match, keep going..."
I've enter the key with copy/paste and also completely manually and it makes no difference. It will not verify the brain key.
I've created a new account and it also will not let me verify the brain key.
[UPDATE]
Woah! I just tried to create a brain key on a completely different wallet in the webwallet and I got the *exact* same brain key as I got on the light client for a completely different wallet.
Something is definitely wrong here.