iRealPro can use a default (straight, sans-serif) font and a hand written (real book) font.
When I use the hand written font, I noticed that there are still some symbols that use the default font.
For example, the repeat bar (%) is hand written, but the repeat 2 bars uses the default font.
N.C. is shown in the default font, as are the rehearsal marks.

Is this intentional? I gimped in some alternative symbols using the hand written font and they look okay to me.