I use the same 2 accounts simultaneously on my laptop with 12.10 (as a Google account) and on my desktop with 10.10 (as a Jabber account), and occasionally through the gmail website.
I just logged out on my laptop, and logged in on my desktop. I was able to login again on my laptop without issues.
In my case it seems to be due to the amount of time expired. During the working day I can log out and in without problems but the next day I'll have to reauthorize both accounts.
The cookies for both accounts are set to expire somewhere in 2013/2014.
I use the same 2 accounts simultaneously on my laptop with 12.10 (as a Google account) and on my desktop with 10.10 (as a Jabber account), and occasionally through the gmail website.
I just logged out on my laptop, and logged in on my desktop. I was able to login again on my laptop without issues.
In my case it seems to be due to the amount of time expired. During the working day I can log out and in without problems but the next day I'll have to reauthorize both accounts.
The cookies for both accounts are set to expire somewhere in 2013/2014.