Comment 12 for bug 403825

You shouldn't install flashplugin-installer (formerly flashplugin-nonfree) and adobe-flashplugin at the same time because they both provide similar functionality.
I recommend removing flashplugin-installer as adobe-flashplugin is the more reliable package.

You still have the old version because it takes some time until the package has been built and all mirrors have synced from the main server.