Comment 42 for bug 606652

I had the same error, so based on comments here I viewed the end of the apt log file, /var/log/dist-upgrade/apt.log. There I found that nspluginwrapper was "held", so I removed nspluginwrapper via Synaptic (realizing I could have used 'sudo apt-get remove nspluginwrapper'), which also removed flashplugin. This fixed my problem, and I hope it helps fix yours.