Folder creation regression in 6.5.3.1

[Daniel Shahaf]

Thomas Kahle wrote on Tue, Apr 10, 2012 at 14:36:28 +0200:
>  Creating folder INBOX/science-ml[RemoteGentoo]
>  ERROR: Creating folder INBOX/science-ml on repository RemoteGentoo
>   Folder 'INBOX/science-ml'[RemoteGentoo] could not be created. Server responded: ('NO', ['Invalid mailbox name: INBOX/science-ml'])
>  ERROR: Folder 'INBOX/science-ml'[RemoteGentoo] could not be created. Server responded: ('NO', ['Invalid mailbox name: INBOX/science-ml'])
>  *** Finished account 'Gentoo' in 0:03
> 
> The folder science-ml is indeed a non-filtered folder that exists on
> both sides.  I think offlineimap-6.5.3.1 wrongly tries to create it
> remotely and the server complains because it already exists.
> 
> Any ideas?

What's the folder separator on the server?  Is it "/"?

> Thanks!
> Thomas