rsync 2.6.4-4 error

[hacker <golfbuf@gmail.com>]

I upgraded from 2.6.4-2 to 2.6.4-4 on my server and now my client gets an error:

rsync: read error: Connection reset by peer (104)
rsync error: error in rsync protocol data stream (code 12) at io.c(570)
_exit_cleanup(cope=12), file=io.c, line=570): about to call exit(12)

My client is still using 2.6.4-2.

So, I've downgraded my server to 2.6.4-2 and now can rsync ok.

But, I upgraded both server and client, and now get the same error
message.  Anyone else experiencing this problem.  Should I downgrade
and bug file?