I'm affected, too. After terminating the update-manager and starting it manually, the window showed up, but no icon in the launcher. I also couldn't switch to the update-manager via alt+tab. The only way to get back to the update-manager was to minimize all other windows.
I'm affected, too. After terminating the update-manager and starting it manually, the window showed up, but no icon in the launcher. I also couldn't switch to the update-manager via alt+tab. The only way to get back to the update-manager was to minimize all other windows.