Attempting to update flashplugin on Ubuntu Precise resulted in an error. Removing the package and reinstalling it resulted in the following:
So I tried updating one of my boxen running the Lucid Kubuntu LTS to the new Precise Pangolin beta. During the upgrade, I received an error message stating that adobe-flashplugin could not be upgraded. I ignored it and continued with the upgrade and all went swimmingly. Once the upgrade was completed and I had rebooted, when I tried to run an apt-get update, I ran into an error with respect to the adobe-flashplugin package. When I tried to remove it, it did not work. As a stop-gap measure, I removed a number of packages that depended on it including Firefox and sun-java6.
I'm pretty sure most people are aware of the huge amount of content available on sites like YouTube, Megavideo etc., and of the existence of hangers-on sites such as Keepvid, Clip Nabber etc. as well that let you leech the FLV files directly. Furthermore, I'm also sure that you've noticed many of these leech sites not working more often than not nowadays.
The Flash plug-in for Opera in Kubuntu has been FUBAR-ed and it seems that it's caused due to an Opera bug w.r.t Flash player 9.0.115 which is fixed in the 9.50 betas. However, since Kubuntu etc. are still using 9.27, the only way to fix this issue is to go back to 9.0.48.