In addition to [Adam’s post](http://www.adamhopkinson.co.uk/2006/07/22/series60-nokia-n80-mac-address-bug/), it seems that my Nokia E60 is affected, too. It reports to have the following MAC address:
`00015de3e668`
and Adam’s script converts this to
`0015de3e6608`
but the real address turns out to be (thanks to Thomas and kismac)
`0015de3e0668`
So it seems the firmware tends to drop some zeros at the end and then pads the rest of the address with zeros to the left. Just FYI and maybe this post helps someone else in his/her confusion.