Many thanks for the suggestion torreydale. It's all rather odd. Install/remove i.e. Synaptic reports that pepperflash is not installed. It also reports that Adobe Flash is not installed. Meanwhile firefox at first reported in red that the Flash plug-in was out of date and vulnerable. Then I disabled it, and now the Adobe flash download site says I should download it, and Firefox says it does not exist to re-enable it. Meanwhile video web sites continue to work, presumably via HTML5, and the update error and log remains unaltered. So I attempted to install pepperflash, in order to clean up by uninstalling it, and it refuses to install with a similar error to the update. It seems to have been withdrawn. So how do I clean up I wonder? To me it looks like a re-install of Lite 3.8 itself, start again. Quite a mess.