Avast seems to be blocking websites despite them being excluded. Let's say I'm just one-day browsing Tumblr, then if I refresh or try browsing further into the website I'll get a spdy_protocol error. I put the website on the excluded, wait, refresh and it's still giving me the error. Disabling the web shield, however, seems to work so I'm not sure what's wrong. The two websites are totally fine, there's no real report just a blank page on chrome saying the spdy_protocol error.