SSL connection problems to imap server

I recently upgraded my imap server (dovecot) to the most recent 

version. The imap server seems to be running correctly as I can connect to it with regular clients (thunderbird). The server is definately listening on port 993. However roundcube cannot connect for some reason. The error is:

03-Mar-2006 12:13:56 -0800] IMAP Error: Could not connect to ssl://smachimo./myserver/.us at port 993: Operation now in progress in
on line 0

I tried switching the settings to connect to localhost as well:

[03-Mar-2006 12:18:35 -0800] IMAP Error: Could not connect to ssl://localhost at port 993: Operation now in progress in on line 0

Does anyone know what "Operation now in progress in  on line 0" means?