The field length wasn't updated after changing the hotkey display to capitals (which i'm still not really a fan of).
It is probably a good idea to change the default width so that the default keys fit, but there are always going to be hotkey types that will exceed the field length (consider meta+ctrl+alt+shift+print screen).

I was hoping to fix this by adding single character glyphs for the modifiers, backspace, etc, but @xanax ran into problems modifying freesans with the new characters.