I'm also having problems connecting to open WIFI, including home router.
Actually, I connect fine - but then Microb will not access any webpages - even google - after a few seconds. I've also noticed this with the Application Manager when trying to update. However, if I open an SSH session, that will continue to function and access fine.

Would the power saving feature not affect SSH connections?

Console apps (like ping and traceroute) also work and make connections when browser and app manager do not.