The Linux i386 build (BitTorrent Sync 1.1.12) segfaults on my in 32bit ubuntu 13.04 machine. I removed my old .sync directory, restarted btsync, accepted the terms of service, then segfault. Here is the full debug log: [~] ➔ cat .sync/sync.log [20130511 11:44:01.480] test sha1: AE5BD8EFEA5322C4D9986D06680A781392F9A642 [20130511 11:44:01.480] test sha2: 630DCD2966C4336691125448BBB25B4FF412A49C732DB2C8ABC1B8581BD710DD [20130511 11:44:01.480] test aes: 0A940BB5416EF045F1C39458C653EA5A07FEEF74E1D5036E900EEE118E949293 [20130511 11:44:02.506] Got 2 relay ips [20130511 11:44:02.506] Server ip 67.215.229.106:3000 [20130511 11:44:02.506] Server ip 67.215.231.242:3000 [20130511 11:44:04.478] HTTP: IP 127.0.0.1: GET /gui/?token=DQvTfdlkzVzX-bbInRv1L4-xro3PclQ5wIKcklUZXkipVEUrd4KD43Nvt1EAAAAA&action=getsyncfolders&t=1370976244337 [20130511 11:44:06.115] HTTP: IP 127.0.0.1: GET /gui/ [20130511 11:44:06.216] HTTP: IP 127.0.0.1: GET /gui/jquery-1.8.3.js [20130511 11:44:06.218] HTTP: IP 127.0.0.1: GET /gui/jqueryFileTree.js [20130511 11:44:06.220] HTTP: IP 127.0.0.1: GET /gui/jquery.qrcode.min.js [20130511 11:44:06.220] HTTP: IP 127.0.0.1: GET /gui/bootstrap.js [20130511 11:44:06.222] HTTP: IP 127.0.0.1: GET /gui/webui.js [20130511 11:44:06.223] HTTP: IP 127.0.0.1: GET /gui/bootstrap.css [20130511 11:44:06.229] HTTP: IP 127.0.0.1: GET /gui/jqueryFileTree.css [20130511 11:44:06.246] HTTP: IP 127.0.0.1: GET /gui/images/logo.png [20130511 11:44:06.331] HTTP: IP 127.0.0.1: GET /gui/token.html?t=1370976246326 [20130511 11:44:06.387] HTTP: IP 127.0.0.1: GET /gui/?token=PgwQLRD_sKwWZb1KgaJ_WOmv5oy2tGMN5M5jTypfS8HpjSJD3DrPW_Zvt1EAAAAA&action=license&t=1370976246333 [20130511 11:44:06.387] HTTP: IP 127.0.0.1: GET /gui/icon.png [20130511 11:44:10.849] HTTP: IP 127.0.0.1: GET /gui/?token=PgwQLRD_sKwWZb1KgaJ_WOmv5oy2tGMN5M5jTypfS8HpjSJD3DrPW_Zvt1EAAAAA&action=accept&t=1370976250775 [20130511 11:44:11.087] HTTP: IP 127.0.0.1: GET /gui/?token=PgwQLRD_sKwWZb1KgaJ_WOmv5oy2tGMN5M5jTypfS8HpjSJD3DrPW_Zvt1EAAAAA&action=getostype&t=1370976250851 [20130511 11:44:11.087] HTTP: IP 127.0.0.1: GET /gui/?token=PgwQLRD_sKwWZb1KgaJ_WOmv5oy2tGMN5M5jTypfS8HpjSJD3DrPW_Zvt1EAAAAA&action=getsettings&t=1370976250852 [20130511 11:44:11.102] HTTP: IP 127.0.0.1: GET /gui/?token=PgwQLRD_sKwWZb1KgaJ_WOmv5oy2tGMN5M5jTypfS8HpjSJD3DrPW_Zvt1EAAAAA&action=getversion&t=1370976250853 [20130511 11:44:11.171] HTTP: IP 127.0.0.1: GET /gui/?token=PgwQLRD_sKwWZb1KgaJ_WOmv5oy2tGMN5M5jTypfS8HpjSJD3DrPW_Zvt1EAAAAA&action=getostype&t=1370976251105 [20130511 11:44:11.362] HTTP: IP 127.0.0.1: GET /gui/?token=PgwQLRD_sKwWZb1KgaJ_WOmv5oy2tGMN5M5jTypfS8HpjSJD3DrPW_Zvt1EAAAAA&action=checknewversion&t=1370976251173 [20130511 11:44:11.362] HTTP: IP 127.0.0.1: GET /gui/?token=PgwQLRD_sKwWZb1KgaJ_WOmv5oy2tGMN5M5jTypfS8HpjSJD3DrPW_Zvt1EAAAAA&action=getdir&dir=&t=1370976251193