For me it stuck during an upgrade (along with the warning that if I interrupted the process my system might be unusable). I was able to get past it by using:
http://askubuntu.com/questions/149017/how-to-cancel-update-manager-downloading-flashplugin-installer/375295#375295
For me it stuck during an upgrade (along with the warning that if I interrupted the process my system might be unusable).
I was able to get past it by using:
http:// askubuntu. com/questions/ 149017/ how-to- cancel- update- manager- downloading- flashplugin- installer/ 375295# 375295