Problem with Overheating then reboot since Ubuntu 11.10

I'm trying to identify a bug present which plague several users.

Symtoms

Since Ubuntu 11.10, my T500 has reduced battery life (around 3 hours with low screen power) and reboots when charge is important due to overheating (more than 100°).

This is clearly a software bug, as I didn't have this behavior in Ubuntu 11.04. It appears since 11.10 (first ubuntu release with Linux kernel 3.x).

Data

List of machines with the same problem

Model
T500

References

Launchpad entry:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/751689