rsync - Oct 2002 - rsync 2.5.5 and exit 1 hard to explain.

Hi.

I can't figure out why my rsync is exiting with exit code 1.  I can't
see any errors in the logs, and the last thing it says before quitting
is:

  wrote 62157392 bytes  read 12552 bytes  157591.75 bytes/sec
  total size is 2016803293  speedup is 32.44
  _exit_cleanup(code=0, file=main.c, line=578): entered
  rsync error: partial transfer (code 23) at main.c(578)
  _exit_cleanup(code=0, file=main.c, line=578): about to call exit(23)

It even seems that all files are copied.

RedHat 7.2 with home-compiled version of rsync 2.5.5.

Could anybody shed some light on this?

Thanks,

Erik.