grub-probe: error: cannot stat `/dev/root'

From: CACook@xxxxxxxxxxxxxxx
Date: Fri, 6 May 2011 10:44:21 -0700

This just started after my most recent (very painful) dist-upgrade. It seems that BTRFS is not compatible with grub and Debian. I very nearly lost my whole system because of this catastrophe.

Does anyone know the nature of the error and how to fix?

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