Hi Timo and all. imap/cmd-create.c contains the following bit of code:

    len = strlen(full_mailbox);
    if (len == 0 || full_mailbox[len-1] != ns->sep)
            directory = FALSE;
    else {
            /* name ends with hierarchy separator - client is just
               informing us that it wants to create children under this
               mailbox. */
            directory = TRUE;
            mailbox = t_strndup(mailbox, len-1);
            full_mailbox = t_strndup(full_mailbox, 

strlen(full_mailbox)-1); i_info("Z CREATE NAME: YYY%sYYY", mailbox); }

We've been having trouble with people not being able to create a mail folder that will contain other folders. Tried it both with users using mbox (where this would be a filesystem directory) and maildir. Failed everytime because of a test which rejects folder names that end with MAILDIR_FS_SEP.

Looks like the above bit of code is supposed to catch these, make a note of the fact that the client wants a directory, and strip off that trailing separator. In fact, it does this in the case of 'full_mailbox'. However, for 'mailbox' (it seems to me) the code is incorrect as its using the len-1 which is the length of 'full_mailbox', not 'mailbox'. This means that when 'mailbox' and 'full_mailbox' are the same length--that is, for the default namespace (no prefix), it happens to work. However, in any other namespace, it won't, as 'full_mailbox' will always be longer then 'mailbox' if there is a ns prefix, and hence that trailing separator won't be trimmed. (As a matter of fact, in the unlikely instance that the prefix is a single character this will trim the null character from 'mailbox', which probably isn't a good thing.)

So. Am I missing something, or crazy, or is this really a bug? Thanks,

-Brian