Comment 5 for bug 176895

A dirty and more simpler than compile mldonkey by hand is download the gutsy version, yes 2.9.0, http://packages.ubuntu.com/gutsy/amd64/mldonkey-server/download and then "sudo dpkg -i mldonkey-server_2.9.0-1_amd64.deb", apt will automatically replace the installation of 2.9.3, by now it's working perfect, the configuration files and all mldonkey related stuff have the same format.

But this is as I said, a dirty workaround, and also if the ocaml version of ubuntu hardy is not upgraded or patched againist 64 bit bug, it will make troubles in other pieces of software.