I found a minor problem after upgrading. I currently have the avast firewall set to ask me when a new program tries to connect to the internet. After I restarted my computer and logged in after the upgrade, I noticed the avast setup process seemed to have froze, so I rebooted, and when I logged in, avast asked me whether or not to allow the avast setup to access the internet. It appears that if the GUI component is not loaded, dialogs from the firewall are lost, which resulted in the avast setup process freezing.