@Simon: It's not clear to me what's going on with your system that you think is related to this bug. Neither libmagick++5 nor VLC are Python packages. You will need to be clearer about the possible relationship. Also, I see you have a mix of quantal and precise sources. That is generally not a good idea (although I did not look at what's in that PPA to see if there is an actual problem).
@Simon: It's not clear to me what's going on with your system that you think is related to this bug. Neither libmagick++5 nor VLC are Python packages. You will need to be clearer about the possible relationship. Also, I see you have a mix of quantal and precise sources. That is generally not a good idea (although I did not look at what's in that PPA to see if there is an actual problem).