This looks like the failure of grub-probe to find underlying device from partition. This should be fixed by now. Can you retest?
-- Regards Vladimir 'φ-coder/phcoder' Serbinenko
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Bug#590884: grub-pc: upgrading with vmlinuz-2.6.32-5-amd64 kernel fails on device detection
Vladimir 'φ-coder/phcoder' Serbinenko Sun, 14 Nov 2010 07:36:28 -0800
