This page describe the progress of removing usage of the obsolete devfs in the DebianInstaller.
[http://packages.qa.debian.org/busybox busybox] is currently built with CONFIG_FEATURE_DEVFS activated. It needs to be deactivated in debian/config-udeb.
We should not have any problems in uploading this change without any specific changes in the DebianInstaller. Testing might be desirable though. Current d-i works correctly with modified busybox on i386.
Remove /etc/udev/devfs.rules in [http://packages.qa.debian.org/udev udev]
- Works with modified busybox on i386.