It appears the session expiration issues were occurring when roundcube had problems talking to the imap server, either slow responsiveness or blatant error. Is there a way to prevent roundcube from closing the session when an imap error occurs, or at least increase the timeout value waiting for a response?
I believe that you should check the invalid session information in the roundcube log:
On Feb 15, 2012, at 5:08 PM, James Devine wrote:
> Any idea how I might verify what the problem is? I'm not seeing anything popping up in the error logs and I'm not able to reproduce this myself, I'm going off reports from customers
Feb 15 18:38:49 a roundcube: Aborted session 1fkpva9li86orrd9lo0dlvlur3; no valid session data found
Feb 15 18:40:19 a roundcube: Aborted session tv251jg03u5velh2t40om7tlg0; no valid session data found
But i don't know how to reproduce the issue. It might even be the customer browser issue...
Cheers, Jernej