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I copied my "Local Folders" mail folder from another computer and after setting up my email account in Thunderbird, I pasted my old "Local Folders" here, and the mail folders appeared correctly in Thunderbird. However, although my folder structure appears to be copied, Thunderbird does not actually load my e-mails. I can click the folder, and it shows the "Loading" mouse cursor, but nothing happens. Also, it shows a tiny yellow box below the cursor, whenever I move over one of those folders. This does not happen when I move over a working IMAP folder. Any idea what this could be? Here's an image:

enter image description here

Using Arch Linux, Thunderbird 7.0.1

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This is a hard question to answer, because there are many different IMAP servers, mailbox layouts, and possible causes. Please tell us what IMAP server you're using, and show us a long listing (ls -l) of the root mail folder and one of the subfolders (10 lines or so anyway). – Andrew Schulman Nov 2 '11 at 9:38

I once had problems with a mailbox which I wasn't able to move between two windows boxes, I guess there were some glitches in the profile. I could solve the problem using some import-/export-addon.

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Thanks for your suggestion. Turns out, it was related to the permissions of the folders. My user did not have write permissions (only read), and after fixing this they open again! – user95156 Nov 4 '11 at 19:49

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