My Macbook Pro seems to sync to Dropbox fine but I cannot sync at all with my iPad mini (1st gen). My mini has IOS 1.7.6 and my MBP is running OS X 10 (Yosemite). Although I am running the latest beta this problem existed before 11 and before Yosemite. The sync begins in my mini appearing to start normally but after a couple of seconds I get a dialog box stating "error downloading from dropbox:Error Domain=NSCocoaErrorDomain Code=4". There is some other stuff listed in the dialog box that seems to point to a highlights file (highlights.hlt. Not sure what is happening but I haven't been able to sync in a long time. Any help?