PS please don't cc the original authors when reporting bugs.
OK, but I just replied to all recipients of your mail...
Sorry, I've spend much time to isolate that bug and I don't wanna be part of any kind of xemacs vs emacs flame war in response.
compile.el of emacs 23 acts inconsistently and I think if it's due to different system or unicode settings it's only one incarnation of a bigger underlying bug, one could be worried of ...