Comment 1 for bug 176225

That was the case before the new IO implementation (say rev 1203 and earlier I think). Now, this is what I got:

$ cat t.ss
(import (rnrs))
(let ([p (standard-output-port)])
  (put-u8 p 175)
  (flush-output-port p))
$ ikarus --r6rs-script t.ss | wc
       0 1 1

Also:
> (port-transcoder (standard-output-port))
#f