On 2 of my 6 Ubuntu 10.04 machines, every time I run dist-upgrade (or try to sudo apt-get install anything) it fails and says I need to run with --fix-missing. I've read a bit on this and I've looked through /etc/apt/. I'm not sure what is causing the problem.

Is it possible to copy the /etc/apt/ directory from one of the 4 machines that works fine to the 2 machines that have problems?