--- a/ubuntuone/syncdaemon/tritcask.py	2013-01-18 18:27:41.809017000 +0200
+++ b/ubuntuone/syncdaemon/tritcask.py	2013-01-22 15:08:15.015987671 +0200
@@ -300,6 +300,7 @@
             self.fd.seek(0, os.SEEK_END)
         self.fd.write(crc32 + header)
         self.fd.write(key)
+        self.fd.flush()
         value_pos = self.fd.tell()
         self.fd.write(value)
         self.fd.flush()