This may be intentional, as Thunderbird saves font preferences separately for every encoding. You can change your preferences via "Edit -> Preferences -> Display -> Formatting -> Fonts...".
If you had previously decreased the font size for your standard enconding (say "Western"), this would explain the discrepancy you see when viewing a message with a different encoding. See also here: http://kb.mozillazine.org/Font_settings_in_Thunderbird -- Font size seems to vary with character encoding https://bugs.launchpad.net/bugs/263976 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs