[DM800HD] Update bouquet and box won't boot

Somebody with a 800hd has reported to me that when they update the bouquet using DBE the box no longer boots i.e. get stuck and sits with the progress bar stuck at around 2 thirds. The only way to get the box back is to flash on much older bouquet back onto the box.

They've check free RAM which is sat at around 14Mb and I for the life of me can't figure out what might be causing the issue.

Anybody have any brainwave ideas on this?