[Dovecot] Recommended dovecot version

[Diego M. Vadell]

Hi,
  I'm running CentOS 4 in a X86_64 server with dovecot. I've been having some 
(already reported by others) problems. For example, sometimes - randomly - a 
mbox file wil get a couple of lines at the beggining of the mbox file 
(/var/spool/mail/user), before the first From line, and dovecot will complain 
that that file is not a mbox file. Also, neither sylpheed nor thunderbird 
would get new mail via imap a second time (I have to kill thunderbird, then 
run it again so it would give me the new mails). But I'm more concerned by 
the mbox corruption.
   so I want to upgrade, but to what? 0.99.14? But in www.dovecot.org says 
that dovecot-1.0 is recommended. But it also says -alpha! (not even beta: 
alpha). There is also a stable branch, but it's not the recommended one (or 
is it?). 
   Can anyone point me to a stable version that addresses the mbox corruption 
issue, or if there isn't such a version, any idea of when it will be ready?

Thank you.
 -- Diego.