This bug happens also with the default Ambiance theme on Ubuntu 17.10. See attached screenshot.
** Attachment added: "thunderbird_low_contrast.png" https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1710059/+attachment/5070119/+files/thunderbird_low_contrast.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1710059 Title: Theming issue when searching in Thunderbird Status in ubuntu-mate: Invalid Status in thunderbird package in Ubuntu: New Status in ubuntu-mate-artwork package in Ubuntu: Invalid Bug description: Affecting the dropdown list of the search input field in the top right of Thunderbird. See attached screenshot. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1710059/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

