Greetings, I'm certain this is self inflicted, but for the life of my I can't figure what I did. I've got Thunderbird installed on two machines. One a Dell XPS 13 laptop, the other a Dell Precision Desktop, both with Windows 10. I use Resilio sync to synchronize a profile so both machines are displaying the same. I'm very careful about not opening both at the same time. This has all worked perfectly for years. Everything is fine on the XPS. On the Precision, all the text in the new message window is displayed in bold. The odd part is the message isn't bold when received by the recipient. Any idea what it is that I've buggered up? I've uninstalled Thunderbird using Revo Installer, rebooted and then installed from scratch with no effect. So, I'm guessing there is a setting that's been toggled in the Registry to cause this. Any help would be appreciated. Chris