I ran the update and had the same result as michaaa62, the update failed to retrieve the new file from people.debian.org, but, I see no reason to remove or revert anything, flash seems to be working fine.
# update-flashplugin-nonfree --status |grep Flash
Flash Player version installed on this system : 11.2.202.336
Flash Player version available on upstream site: 11.2.202.341
The update, for me, just didn't work, but didn't change anything. It seems that any installing that it did was from the previous update. Is anyone having trouble with flash? If so, could you provide a link to the site where the problem occurs?
When I want to check flash, I go to this site and hit any one of the previews to check it out.
http://www.templateworld.com/all_full_flash_sites_1.html