Just installed 7.10.1407 over here.
Booting up the computer seems a bit sluggish since the update. It takes a while for Avast to get completely set up, and when I double click the orange ball to check it, it says my system's unsecured. If I leave it alone for a few seconds it loads up alright. After everything's started up, though, my computer seems to run normally. I tried ticking "Load Avast only after loading other services" and it did shave about twenty seconds off the loading time, but it still seems a bit slow, sometimes locking my computer up for a few seconds.
Other than this, I haven't had any real problems. The program works well so far, it's just like dragging a horse up a hill to start it.