Bug#614548: Grub installation on mdadm raid-0 array fails
Description: By default, the Squeeze installer uses mdadm metablock version 1.2 when it creates a new raid-0 array. This results in grub not being able to install, since there's obviously an incompatibility between grub and this new metablock version. A workaround on this issue is to boot via a livecd and build the array using the --metablock=0.90 parameter on mdadm. Then reboot with debian and install squeeze on this pre-made array (grub installs properly).
Solution: see above. Perhaps the squeeze installer should use the --metablock=0.90 parameter by default?