Bart, Thank you for maintaining this package for so long. Possibly hundreds of thousands depend on in to maintain a working Flash player. Thanks!
Given how this bug really pops up a lot [1], and given how its severity is always grave (because it's mostly a huge security issue), have you or would you consider patches that adapted the update script to fetch the tar.gz from the upstream site directly? The upstream download site _is_ available over HTTPS [2]. Could this be acceptable? [1]: https://bugs.debian.org/cgi-bin/pkgreport.cgi?dist=unstable;package=flashplugin-nonfree [2]: https://www.ssllabs.com/ssltest/analyze.html?d=fpdownload.macromedia.com