I’m setting up 64bit Ubuntu 10.04 LTS today and received this error “adobe-flashplugin is virtual”, which is listed here:
https://bugs.launchpad.net/ubuntu/+source/apturl/+bug/554449. The fix was simple. Following the directions found here:
You just need to install the 64 bit version from the PPA by executing the following:
sudo add-apt-repository ppa:sevenmachines/flash && sudo apt-get update && sudo apt-get install flashplugin64-installer
and type in your administrator password to continue.
Download done.Flash Plugin installed.