I'm also seeing this.
Thunderbird 17.01 64-bit Linux Mint Debian Edition (using MATE)
I have some pretty massive IMAP folders, but no encryption.
Thank you for pointing out the message pane workaround; it's awkward, but it'll do until this gets fixed or I find an alternative mail client.
I'm also seeing this.
Thunderbird 17.01
64-bit Linux Mint Debian Edition (using MATE)
I have some pretty massive IMAP folders, but no encryption.
Thank you for pointing out the message pane workaround; it's awkward, but it'll do until this gets fixed or I find an alternative mail client.