I use geiser with racket. I have update to latest git repo of geiser and racket.
My emacs is a little old.
GNU Emacs 23.2.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1) of 2010-09-02 on pluot, modified by Debian
When requiring a module into geiser REPL, sometimes it got not response. It's very annoy. I try start emacs without init script, it's still the same.
Another
strange thing is that when I close the geiser emacs prompt that "These
default coding systems were tried to encode ..." and let me choose
encoding. It seems geiser process buffer use utf-8 encoding.