The problem here is that the current upstream flash version
11.2.202.643 is not yet packaged by our package maintainer:
When the install routine tries to access the place where md5 sums of
the upstream binary are stored for comparison (that is Bart's user
directory at Debian) the download of those md5 sums fails.
I worked around that problem with:
* go to https://www.adobe.com/de/software/flash/about/
* Download the flash tgz
* untar
* cp libflashplayer.so /usr/lib/flashplugin-nonfree/
* update-alternatives --quiet --install
/usr/lib/mozilla/plugins/flash-mozilla.so flash-mozilla.so
/usr/lib/flashplugin-nonfree/libflashplayer.so 50
* cp flash-player-properties /usr/bin/flash-player-properties
* check that you have the new version installed by going to
https://www.adobe.com/de/software/flash/about/
