@Ehsan from comment #30 ("I'd be curious to know, FWIW!"): Turns out that the Thunderbird e-mail front end is one big JS/XUL application: http://mxr.mozilla.org/comm-central/source/editor/ui/composer/content/editor.js
I haven't looked very much, but I can answer some questions. For example the "Bold button" is defined here: http://mxr.mozilla.org/comm-central/source/editor/ui/composer/content/editorOverlay.xul#1138 There is an observer, so when the bold state changes, it gets noticed and the UI is updated. I will now hunt through this code to see whether I can find the cause of the lost font. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/584632 Title: composer changes font mid email To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/584632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs