The bug appears to have returned in version 9.0.48.0.3.
(unimportant information has been replaced with <%description> #apt-cache policy flashplugin-nonfree flashplugin-nonfree: Installed: (none) Candidate: 9.0.48.0.3 Version table: 9.0.48.0.3 0 <%mirrors> #apt-get install flashplugin-nonfree <%installation and download script> Download done. md5sum mismatch install_flash_player_9_linux.tar.gz The Flash plugin is NOT installed. Jacob Emmert-Aronson