hm... could it be that the archiver for some reason is looking
at rolled back blocks?

to ron:

are you using temporal snapshots?  i'v seen the same symptom but hadnt
the nerves to look deeper into it...  just reformated the fossil from
last score and disabled snapshots and snaptime.  :(

it happend while i dumped the blocks from another fossils venti to the
same venti that the failing fossil was archiving to...  with snapshots
enabled.

have no idea if this is relevant...

keep on debugging!

--
cinap