I've been trying out BitTorrent Sync, intending to move my larger piles of data there rather than using Dropbox. I really like the cost savings, and the quicker sync across my LAN without changes having to sync up to the cloud first, but... Lately I'm seeing a problem. I *think* it might be since upgrading to 1.3.106 but I can't be sure. My nodes are detecting locally changed files and showing an upwards arrow on the devices page with the correct number of bytes, and other nodes soon show a downward arrow with the same number of bytes. Some of my shares sync fairly quickly, but some just sit there knowing that they need to sync but not actually syncing the changes. In case it's relevant... all of my OSX and Windows nodes have their firewall configured to drop outbound UDP on port 1900. This is to avoid that traffic killing a Control4 Home Automation processor on the same LAN. I know the fault is with the Control4 box, but I can't fix that so have to work around it. This firewall stuff is not new though. It's been there for weeks without causing sync problems. I have a mixture of nodes... OSX Mavericks, Windows 8, ReadyNAS 104, WD My Cloud, and some Android and iOS devices. Yes, my house has way too much gadgetry! Any ideas please?