I've just applied an update flashplugin-nonfree which when I checked in Synaptic updated flashplugin-installer. I checked it out because I wasn't sure at first that it wasn't going to re-install adobe-flashplugin which was removed during the installation of flashplugin-installer as recommended elsewhere.
My question is why is it shown as flashplugin-nonfree in Update Manager, and flashplugin-installer in Synaptic? Is it that flashplugin-installer is just one part of flashplugin-nonfree?