User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0 (Beta/Release) Build ID: 20130511120803 Steps to reproduce: Hi! I'm using an Dovecot 2.x Server with IMAP: Hirarchy seperator is '$'. Im also using the listescape Plugin. I tried to create a folder name "Stuff/Example" Actual results: TB created a Folder "Stuff" with a ubfolder "Example". Expected results: A folder named "Stuff/Example" should have been created. I tried the same with Outlook 13 -> Everything worked fine. Please could someone check this?

(In reply to d.egger from comment #0) > I tried to create a folder name "Stuff/Example" > Actual results: > TB created a Folder "Stuff" with a ubfolder "Example". > Expected results: > A folder named "Stuff/Example" should have been created. (1) Tb passes requested string of "Stuff/Example" as-is to IMAP server. If you requested "Stuff/Example" when "Parent" is current folder, 'create "Parent$Stuff/Example"' is requested to IMAP server because delimiter="$". This is correct when delimiter="/". This is also correct when delimiter="$" or ".", beccause "/" is never delimiter used by server. All is up to IMAP server. i.e. 'Who created Folder "Stuff" with a subfolder "Example"' is server. Because server is perhaps Linux, "/" is delimiter in file system at server. Your Dovecot perhaps creates directory named Parent/Stuff/, and creates directory named Parent/Stuff/Example/ or file named Parent/Stuff/Example. It's Parent -> Stuff -> Example, so your Dovecot perhaps passes Mbox name of following to Thunderbird. "Parent", "Parent$Stuff", and "Parent$Stuff$Example". Note: If IMAP server of delemiter!="/" actually creates Mbox named "Stuff/Example" instead of "Mbox of Stuff and Mbox of Stuff$Example", Tb probably failss to handle it correctly, because "/" is also used as path delimiter of internal URL format path in Tb. > I tried the same with Outlook 13 -> Everything worked fine. After creation by Outlook, what Mbox name is passed from your Dovecot to Thunderbird and what Mbox name is shown by Tb? (See bug 402793 comment #28 and get IMAP log, and check LSUB response and LIST response in log file.) folder

Oh, you look to have found bug 29926 already.