Dear Thunderbird for Linux Users, Please apply the following recommended solution. This is the only real solution to the missing folder pane in Thunderbird for Linux. All the other solutions do not work. In /home/<user>, $ nano delete-all-msf.sh Type in the following 2 lines: #!/bin/sh find . -type f -name *.msf -exec rm -f {} \; Save the file. $ su - # chmod +x delete-all-msf.sh # exit $ cd $ ./delete-all-msf.sh Start Thunderbird for Linux. The above solution is to delete all the corrupted mail summary files and let Thunderbird for Linux rebuild the *.msf files. Thank you very much. Yours sincerely, Mr. Turritopsis Dohrnii Teo En Ming (Zhang Enming) @ Time Traveller Former old abandoned name: Mr. Teo En Ming (Zhang Enming) SINGAPORE CITIZEN Bachelor of Engineering (2nd Class Lower Honours) in Mechanical Engineering with Aeronautics and Astronautics Option (Graduated from National University of Singapore in December 2006) Diploma in Mechatronics Engineering with Merit (Graduated from Singapore Polytechnic in 1998) Currently learning CISCO Switches and Routers, CISCO Internetworking Operating System (IOS), Computer Networking, Network Operating Systems, Microsoft Windows Server 2012 R2, Active Directory, DNS Server and DHCP Server as a *hobby* at Singapore Polytechnic (information accurate as at 16 November 2016) Mobile Phone #1: +65-8692-1024 (M1 Mobile Postpaid) Mobile Phone #2: +65-8712-7323 (Singtel Mobile Prepaid) Email Address #1: teo.en.ming@gmail.com Email Address #2: turritopsis.dohrnii.teo@gmail.com Age: 38 years old 16th November 2016 Wednesday 11:25 AM Singapore Time *I am an entry level/junior/beginner Information Technology (IT) Specialist/Systems Engineer/Linux Server Administrator/Helpdesk Support/Computer Technician/Android Enthusiast available for hire anywhere in the world!!! Prospective employers, businesses and companies in any part of the world please feel free to contact me for my curriculum vitae/resume. I am also aspiring to be a network engineer. On-job-training (OJT) opportunities are greatly appreciated. Thank you very much.*