A workaround is to use the terminal to install/remove the packages yourself using apt-get install/remove.
I have also recently encountered a similar bug in the Update Manager that prevents updates from being installed (bug 898807).
A workaround is to use the terminal to install/remove the packages yourself using apt-get install/remove.
I have also recently encountered a similar bug in the Update Manager that prevents updates from being installed (bug 898807).