This looks like it is being confirmed by IFI. Stay tuned.
IFI has posted an update on their web site dealing with
the 8.2Voltage issue. Team 1425 feels that the issue that
we observed with the code errors and other random
behaviour is related (likely a different symptom of the same problem).
We are in contact with IFI and the IFI rep reported that
they reproduced the temperature sensitivity issue.
The solution posted on their site is listed as "temporary" so
I would expect future updates from them. Check out:
http://www.ifirobotics.com/docs/memory_problem_8722.pdf