On Debian GNU/Linux (starting from Etch), I'm used to replace the /bin/sh link to /bin/dash (points to /bin/bash by default). It fails very badly (the system is almost unusable after reboot) because /bin/mount is a shell script (from package freebsd-utils) using "exec -a" (exec is a shell builtin), which seems to be a bashism.
Thanks for noticing this, but the fix is already pending in SVN, see http://svn.debian.org/wsvn/glibc-bsd/trunk/freebsd-utils/?op=log Petr