There has been more than one example of a load of KGs being mistaken for Lbs. I think an RAF C130 was loaded as such during the Gulf War with unhappy consequences for the airframe. An inevitable incident (some might say) in an operation that uses both.
Also, I think there was a USAF C5 which came to an unhappy end during the Gulf War when an Abrams tank moved in the climb.
Both these stories will need verifying. Can anyone out there confirm?