I am not sure what is meant by "duplicate by [some closed bug]" I must say I experience it for several years on one particular workstation. I have only one account, bu I have to enter master password six (6) times. Only first entry is necessary, pressing OK on five others is sufficient. I have only one account. WARNING: This contains sensitive information which shouldn't be forwarded or published without permission. Application Basics Name: Thunderbird Version: 45.3.0 User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 Profile Directory: /home/konst/.thunderbird/bnj44ytb.default (Local drive) Application Build ID: 20160916153542 Enabled Plugins: about:plugins Build Configuration: about:buildconfig Memory Use: about:memory Mail and News Accounts account2: INCOMING: account2, Local Folders, (none) Local Folders, plain, passwordCleartext account3: INCOMING: account3,