Comment 5 for bug 125681

This is still not working for me, I'm getting this (Gutsy AMD64 fully updated) when installing from the Firefox plugin finder:

Setting up flashplugin-nonfree (9.0.48.0.0ubuntu8) ...
Installing from local file /var/cache/flashplugin-nonfree/install_flash_player_9_linux.tar.gz
Flash Plugin installed.
/usr/lib/nspluginwrapper/i386/linux/npviewer.bin: error while loading shared libraries: libXcomposite.so.1: cannot open shared object file: No such file or directory
nspluginwrapper: no appropriate viewer found for /usr/lib/flashplugin-nonfree/libflashplayer.so
dpkg: error processing flashplugin-nonfree (--configure):
 subprocess post-installation script returned error exit status 1