Hello!
 
There is a critical Bug in Roundcube that empty's the users mailbox when emptying the trash folder...
 
http://trac.roundcube.net/ticket/1484449 "empty kills mailbox"
http://roundcubeforum.net/forum/index.php?topic=2195.new;topicseen#new Empty Trash empties INBOX
 
We also figured out that this always happen's when the user clicks on the button empty trash and at the same time the automatic refresh of the inbox is happen, the inbox is also empty.
Maybe it's the same Problem described in:
 
http://trac.roundcube.net/ticket/1484678 Method session_start with custom session handlers is not thread-safe
 
I hope we can discuss some solutions, because we can't fix this issue by ourselves...
 
thx Stefan