I've set up sync between OS X 10.9 and Ubuntu 12.04 server. Both are using 1.2.28 builds. 1 folder (~40GB) and I use read-only key on Ubuntu side. I set up my share via gui, so no conf file. Sync works fine. However in every ten minutes the index process starts on my Ubuntu server and my sync log fills with lines like: [20131206 22:46:23.918] SyncFileEntry: Failed to write attributes for file /path/to/folder/somefile.ext Also the CPU usage flies high (~50%) /path/to/folder sits on another partition, if that matters. But it's vfat, so there shouldn't be any write/permission issues. Any ideas?