I'm using btsync (1.0.134) on 3 linux machines (32 and 64 bit Ubuntu and 32 bit Debian wheezy) and am experiencing sync issues with long file names. In order to provide enough security to store my data on untrusted hosts, I use encfs (https://en.wikipedia.org/wiki/EncFS) to encrypt my files. Unfortunately, encfs creates very long file names, for example /home/ifoo/.encrypted/Documents/0ZmxrOATx4YgPC5jBr4gRkKU/-VljqWC1rAVUjB9GnB,iaBRY/3NeHN3GTSu5BSe9k9kKE1,T-/hYMaULYtXDVXkWcjRU1Y954D/x,u0qWitYS9Xl1E-mjxjzKMpi,XdoikblNSE0kJVDMKEkDvShNXVvgWmJTBUl6IzSzq1JmAPbBmcHc6Tx39Ao9dYvaatj890Q-HFooH,u,aE-wX-UZmWQlJKPdBZyRJJjvwlNErjSjPoE-Ppj9RQsLOz is a single file name. It looks like btsync can not handle such long file names. Here is an entry from the log file: [20130426 15:43:08] Error opening "/home/ifoo/.encrypted/Documents/0ZmxrOATx4YgPC5jBr4gRkKU/-VljqWC1rAVUjB9GnB,iaBRY/3NeHN3GTSu5BSe9k9kKE1,T-/hYMaULYtXDVXkWcjRU1Y954D/x,u0qWitYS9Xl1E-mjxjzKMpi,XdoikblNSE0kJVDMKEkDvShNXVvgWmJTBUl6IzSzq1JmAPbBmcHc6Tx39Ao9dYvaatj890Q-HFooH,u,aE-wX-UZmWQlJKPdBZyRJJjvwlNErjSjPoE-Ppj9RQsLOz.!sync": [20130426 15:43:08] Error: x,u0qWitYS9Xl1E-mjxjzKMpi,XdoikblNSE0kJVDMKEkDvShNXVvgWmJTBUl6IzSzq1JmAPbBmcHc6Tx39Ao9dYvaatj890Q-HFooH,u,aE-wX-UZmWQlJKPdBZyRJJjvwlNErjSjPoE-Ppj9RQsLOz - WriteToDisk: File name too long The web-ui is downloading everything except for the last 4.2 megabytes (which I assume is the blocksize of the torrent entries) and shows constant network traffic (221.3 kB/s up, 0.2 kB/s down). @devs: My log file is 100mb+ so I provided just a single line. If you need more information, I am happy to upload the file somewhere. (see next post)