Mark formatter changed in v2.23?

[Benjamin Tordoff]

Hi all, I was super excited to see the new D.S. and D.C. support coming in the next release (I have several scores where I've had to fake this) so decided to take a chance and upgrade to the devel release. Mostly everything works fine, but I discovered that the command I typically use to set the rehearsal mark format no longer works:

{

  \set Score.markFormatter = #format-mark-box-alphabet

  R1

  \mark \default % Should be boxed but isn't

  R1

}

This results in:

GNU LilyPond 2.23.10 (running Guile 2.2)

Processing `ex1.ly'

Parsing...

Interpreting music...

warning: cannot find property type-check for `markFormatter' (translation-type?).  perhaps a typing error?

warning: skipping assignment

and the resulting score/parts have the default rehearsal mark scheme. 

Does anyone know if the markFormatter now needs to be set differently, or is this an issue with the current devel version?

Thanks

Ben