Apparently a decision was made in TB78 to make dark mode include the background color of the message display window? This is a bit of a problem when the message being displayed in that window assumes (reasonably) that it is being displayed in a white background and sets a dark font color explicitly. See for example the attached message, which I created based on a real message I received, and which is essentially illegible when dark mode is enabled because the font color is nearly identical to the background color.