Removed the ability to upgrade packages (Synaptic isn't aware of safety levels and that's required for UI, but more importantly the selection of packages is buggy,
the first CTRL+A for instance calls the resolver as if each package was to be upgraded individually as opposed to calling the upgrade on the selection as a whole. In the case of some updates, such as the recent mesa updates, this leads to the removal of clutter, and therefore totem and even Cinnamon.).
Changelog