issues after kernel upgrade in busybox env

[Eial Czerwacki]

Hello,

I have a busybox version 1.19.2 built using buildroot running on a small
usb as rescue image.

previously I Was running kernel 2.6.38.8 and all worked great, due to
drivers missing I was asked to upgrade the rescue usb image's kernel to
3.12.5.

following the upgrade, I've encountered two issues:
    1. I lost the ability to type the console, e.g. when I trying to
type something via the keyboard, I don't get anything, echoing to tty0
prints the output to the screen but doing the same to ttyS0, how can I fix
        this? where should I start looking? the kernel diff between the
to kernel version doesn't seems to yield any usable info.
    2. all the script that were executed in 2.6.38.8 ok, needs to have
/bin/sh before them or else I see this:
        $ /etc/init.d/detect_flash
        detect_flash: applet not found
        any ideas how to fix it?

Thanks.