I removed all flash related packages (flashplugin-installer and flashplugin-nonfree) there was no adobe-flashplugin package. Then I reinstalled the flashplugin-installer - this time it worked without being stuck.
-- upgrade 8.10 to 9.04 - fails because download of adobe flash plugin is stuck https://bugs.launchpad.net/bugs/367591 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
