I'm seeing a bug in Avast:
The Avast overview screen says "You are Protected. All shields active. Everything up-to-date."
Yet the Update settings page says that I am running program version 2015-10-0-2208 and that version 2015-10-2-2214 is available.
I observed this problem on two different Windows machines. Incidentally, I have automatic update enabled, and it did not update by itself.