lenny upgrade -> lost CPU temp monitor

[Adam Hardy <adam.ant@cyberspaceroad.com>]

I had the exact same problem when I upgraded from sarge to etch but I lost the 
grey cells storing the memory of what I did to sort it out.

Looking around the net, I'm not getting much beyond the idea that udev should be 
creating something for me that it doesn't want to.

I tried removing and purging the lm-sensors package, but a re-installation 
didn't help. I read that I should be running sensors-detect to re-create the 
missing config, but when I try, sensor-detect gives me what looks to be a 
completely obsolete warning to "run mkdev.sh" which is a script I don't have, or 
at least it didn't come with lm-sensors.

The lm-sensors docs tell me I must have an old version of lm-sensors but I 
actually have the latest - I just did the lenny upgrade. So I'm not sure what's 
going on.

Any advice?

Thanks
Adam