This looks like a adobe-flashplugin problem. I've never seen the package and don't know what it is doing, but from the errors it looks like the prerm script is broken and uses the update-alternatives command wrongly.
This looks like a adobe-flashplugin problem. I've never seen the package and don't know what it is doing, but from the errors it looks like the prerm script is broken and uses the update-alternatives command wrongly.