Message list is not refreshed

[ThomasMueller]

The folder list shows new messages (for example INBOX (2)) but these are not visible in the message list.
With Roundcube 0.3.0 it was enough to manually click the Refresh button then the messages showed up. With 0.3.1 they don't show up then as well. Choosing another folder doesn't help either.
After some time they appear.

Caching is disabled:

$rcmail_config['enable_caching'] = FALSE;

Server OS is Debian Linux 5.0.3 (Kernel 2.6.31 AMD64)
PHP 5.2.6 as Apache lib
IMAP Server dbmail 2.2.11

I have logs (from $rcmail_config['imap_debug'] = true) and screenshots but I don't want to post them for public access because they contain private data. I can send them by mail on request.
The IMAP response looks good to me.

[alec]

Duplicate of #1485794

[ThomasMueller]

Sounds like it is a duplicate of #1486106 and #1485794.