Bug#570516: we encountered this bug

[Hleb Valoshka]

Just my 2 cents.

Yesterday we were upgrading our old Debian server form Lenny to Squeeze 
and encountered this bug.

We were warned by mdadm post-install scripts that UUID was changed, so 
we upgraded our mdadm.conf, but forgot to re-run update-initramfs :), so 
the system was unbootable with kernel 2.6.32, but (what is interesting) 
it was bootable with 2.2.26.

That raid has version 0.90 (I think it was made in Etch ages). Initramfs 
for kernel 2.6.26 was changed last time on Mar 12  2012, mdadm.conf was 
created 18 Nov 2008, and previous reboot was 6 Aug 2013.

Today's transition to Wheezy was successful.