I noticed a similar anomaly -- with the fonts, not buffalo -- when I was tooling around in Display Options. (I also uncovered another glitch, to be described later).

I didn't get the mimi stuff, but vivi. It was with one of the fonts that came with BIAB: [PGChords]-Custom. Also, the flat symbol rendered as a capital B, albeit as small-caps. I can provide a screen shot if anyone needs to see it.

Now to the glitch. (It is very minor with a simple workaround.) I can repeat it consistently.

I right-click on the song window, select Preferences, and then click Display. This opens the Display Options dialog. I then click the Custom button, which should open the Font dialog. On my computer, that dialog displays only momentarily, then disappears, bringing you back to the Display Options window. If you try to click Cancel or OK at this point, nothing happens. That's because the Font dialog is still actually open but is hidden. I can see a Font button on the Windows task bar! On my computer, I have to click the Font task-bar button two times to make it the active, current window, at which point I can make my font changes.

Added info: At first I failed to notice the Font button on the Windows task bar, so I kept clicking the Custom button on the Display Options dialog. The same thing happened again and again until I finally noticed all those Font buttons cluttering my task bar! (They say repeating the same thing over and over while expecting a different result is a sign of insanity. By that definition, I'm nuts. But this time, it kinda paid off.)