dovecot - Jul 2010 - dovecot 1.2.11/ thunderbird 3.1 - moving folders

Hello List,

customers telled me problem when moving folders in thunderbird which i can
confirm. Following setup on my side:
dovecot 1.2.11 with mbox.
Thunderbird 3.1 with ready mailaccount and "Server supports folders that
contain sub-folders and messages" is disabled.

i create folder1 for subfolders and in folder1 a folder2 for mails.
Now i create folder3 on toplevel like just like folder1 for subfolders. Now i
drag/dop folder2 to folder3.
Thunderbird is moving this folder successful but in folder1/.imap i can still
see a folder folder2 which is containing a dovecot.index.log
At this point thunderbird shows error-message when i start to delete folder1. It
tells:
[CANNOT] Mailbox is'nt selectable: folder1.
AND
[NONEXISTENT] Directory folder1 is'nt empty, can't delete it.

What to do now?
Is error on my or thunderbirds side?
Parts of my config needed?

Thanks,
Andre

On Thu, 2010-07-01 at 17:37 +0200, Andre H?bner wrote:
> i create folder1 for subfolders and in folder1 a folder2 for mails.
> Now i create folder3 on toplevel like just like folder1 for subfolders. Now
i drag/dop folder2 to folder3.
> Thunderbird is moving this folder successful but in folder1/.imap i can
still see a folder folder2 which is containing a dovecot.index.log
> At this point thunderbird shows error-message when i start to delete
folder1. It tells:
> [CANNOT] Mailbox is'nt selectable: folder1.
> AND
> [NONEXISTENT] Directory folder1 is'nt empty, can't delete it.
Yeah, it's a bug. Fixed in v2.0 now .. but since v1.2's code is entirely
different here, I'm not sure if I should bother touching it anymore..

On Thu, 2010-07-01 at 17:37 +0200, Andre H?bner wrote:
> i create folder1 for subfolders and in folder1 a folder2 for mails.
> Now i create folder3 on toplevel like just like folder1 for subfolders. Now
i drag/dop folder2 to folder3.
> Thunderbird is moving this folder successful but in folder1/.imap i can
still see a folder folder2 which is containing a dovecot.index.log
> At this point thunderbird shows error-message when i start to delete
folder1. It tells:
> [CANNOT] Mailbox is'nt selectable: folder1.
> AND
> [NONEXISTENT] Directory folder1 is'nt empty, can't delete it.
Looks like the bug was different than what I thought (v2.0 had a
different bug). Fixed now: 
http://hg.dovecot.org/dovecot-1.2/rev/4af00b22a466