The issue is caused by it attempting to download the beta version. The latest version in feisty works just fine in edgy. It can be downloaded from:
http://packages.ubuntu.com/feisty/web/flashplugin-nonfree Direct link (.deb) available: http://packages.ubuntu.com/cgi- bin/download.pl?arch=i386&file=pool%2Fmultiverse%2Ff%2Fflashplugin- nonfree%2Fflashplugin- nonfree_9.0.31~ubuntu1_i386.deb&md5sum=0bba9df8cbceb65915ab09d65797caa4&arch=i386&type=main -- Edgy backports Flash 9 won't complete download of Flash https://launchpad.net/bugs/80870 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
