I have setup a machine with M6 ( vmware ) .    I copied the .boot file generated from the M6 machine, on a real machine 
running 6.3.2.  

After a few minutes into the first compilation of a big project, the kernel dumped.  I don't have any more info then 
this at the moment.  That machine has been running 6.3.2 for a few months with no problem.

The 6.3.2 machine only has the boot file from 6.4M6 the rest was left untouch.

What info would you need?