I have noticed that fairly frequently my browser "freezes" with
Waiting for AppCache message at the bottom.
Win 7 64-bit.
Version 39.0.2171.95 m of Chrome (which seems to be up-to-date). My laptop uses wired connection to Belkin router.
I also noticed (could be something unrelated) that https (SSL) connections are rather slow on the first try.
I've done simple browser cache clean-up.
This is more an annoyance than a real problem for me (at least for now).