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Forgot I had an old D30 (not 30D, confused?) tucked away and sure enough the lens works as expected on that body. Maybe that's the one I bought it for, can't remember. But I'm thinking if it works on the 30D it ought to work on an original 1D as well. Still, I wish I had my old body to confirm it. Very interesting that the amount of current a lens draws could mean the end of its useful service life when it is otherwise good to go.
There actually was a current problem with the 40D the first year and a bit of its existence. Using an 85L would give tremendous problems. 8-12 shots on a fresh battery, and the camera would shut down. Remove battery, insert again, a few more shots, until after a total of 40 shots or so it would give up completely.
Next use any other lens, no chimping, easily another 4000 shots.... (I know, because I tried )
This was fixed with a firmware upgrade .
Kind regards, Wim