Thanks. Didn't get the debug log to work, I just have a standard log. However I saw in another thread that logging might be broken in this version. Anyway, switched back to 1.1.82 and CPU usage is fine now. EDIT : ok so everything is fine now! I simply deleted all of my synced folders, stopped BTSync, upgraded to 1.2.71, then started it and added all my synced folders. The indexing process took about 1h, and now the btsync process is idle.