I have just encountered this problem. I tried the workaround mentioned above: $ sudo apt-get purge ia32-libs $ sudo apt-get install flashplugin-nonfree but it did not fix the problem for me.
2011-03-30 00:17:55 (1.75 MB/s) - `./adobe- flashplugin_10.2.153.1.orig.tar.gz' saved [4967805/4967805] Download done. Flash Plugin installed. nspluginwrapper: no appropriate viewer found for /usr/lib/flashplugin-installer/libflashplayer.so -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/235946 Title: No Appropriate Viewer Error in Hardy 64 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs