On Wed, 25 Apr 2012 12:49:25 +1000 Chris Jones <chrisjones@spin.net.au> wrote:

> I understand this mailing list is not a support list. But I am curious
> as to what could make the Linux kernel non-bootable from 3.1+ kernels?

A bug probably.

> 
> My 3.0 kernel boots just fine with my current system.

You might like to try 
 a/ describing your current system in more detail.
 b/ describe what actually happens when you try to boot a 3.1+ kernel.
    It is rare that absolutely nothing happens.
    Also describe the provenance of these 3.1+ kernels (do you compile
    yourself, or get them from a distro or....)

NeilBrown