Hello,
I have read your post about JFFS2 CRC and ECC problems. I have the same problem: deep standby for a few hours and I have already ECC problems on the first boot. A few reboots and the ECC are gone. (I 'solved' it myself with a workaround script to grep on ECC at boot time and initiate a reboot if ECC detected). I mailed support from dream multimedia and they proposed to rma the box as ECC are Flash memory errors. So this month my box will go back for repair.
For this reason, I'm investigating if it is possible to not boot anymore from internal flash but from CF or USB. If my CF or usb wears out, just put in a new stick or card.