big crash after kernel update to 244 (initrd cannot find any executables)

Hi, this problem seems to be on ppc and intel based hosts. After the kernel update from 201 to 244 (done as usual) and the reboot, initrd is failing completely, mentioning that it cannot find and executables. It leaves me with a shell prompt. Unfortunately the shell prompt is unusable, because even /bin/ls does not work (funny, the shell scripts are executed anyway, so /bin/sh is ok) ... The Servers are unusable after the kernel update ! I need urgently a solution for this, because all our Servers wants to update (or have to, according to our security policies) and I'm not willing to fix 100 machines by hand ! Regards marco hoehle