Torgeir,
> Am I right in the following assumption?
>
> set up two or more pop3 accounts in mozilla latest nightly;
>
> make both point to the local mail store for mailboxes;
>
> try to download by selecting "get mail from all accounts";
>
> now since the mbox files are written to by two or more processes
> simultaneously, some mail might be lost since there is no mutexes that
> protects mbox file write access.
>
> am I right?
right, we don't have file locking so if you do that you're asking for
trouble.
see http://bugzilla.mozilla.org/show_bug.cgi?id=12850
-Seth