Hi!
There is a little bug in the native build (not using Wine) when naming a marker. Reaper don't accept characters such as ã á ê, etc.
Instead, it displays a square, like a missing character or something. It's just something visual and doesn't affect the "mechanical" usability of markers (you can still select any color or move them around at will), but it would be nice to people like, who have a native tongue with lots of accents, to have it fixed