I have the same issue too: with CSSU thumb, and after installing the last kernel power, I am not able to restore a backup anymore.

The only way to manage the situation is a complete reflash (both FIASCO and VANILLA images)... but I have not tried yet, because I want to save MyDocs partition...

Reflashing only the FIASCO image makes the system very unstable (the system hangs simply by opening or closing the hardware keyboard) and sometime unbootable...

pkz