Dropbox : some files and folders not syncing

This one drove me slightly mad for a few hours.  For me the fix was simple, open the Dropbox preferences, go to Account then click Selective Sync.  Check the boxes of the folders not showing up.  I have no idea how this happened as I highly doubt I set these items to not sync in the first place.

Chrome : slow "resolving host" and err_name_not resolved

Noting this problem happening a lot more recently, even on my very fast internet + using Google DNS.  Tested the same slow/problem pages in Firefox and all is well.

This seems to have fixed it for me.

Copy/paste this into a new tab

chrome://net-internals/#dns

click "Clear Host Cache"

restart Chrome

At first it may throw another err_name_not resolved but after that it should be ok.