various "rsync: connection unexpectedly closed" errors on debian unstable rsync 2.5.6-0.1 package

[wearitdown at myrealbox.com]

Hi.  I have a debian/unstable machine, which I use to rsync with other 
machines, and on which I run an rsync daemon.  rsync --version gives:

    rsync  version 2.5.6  protocol version 26
    Copyright (C) 1996-2002 by Andrew Tridgell and others
    <http://rsync.samba.org/>
    Capabilities: 64-bit files, socketpairs, hard links, symlinks,
    batchfiles,
                  IPv6, 64-bit system inums, 64-bit internal inums


Very frequently when rsync'ing with some machines, I get an error 
similar to the following:

    rsync: connection unexpectedly closed (1491993 bytes read so far)
    rsync error: error in rsync protocol data stream (code 12) at io.c(165)
    rsync: connection unexpectedly closed (1491973 bytes read so far)
    rsync error: error in rsync protocol data stream (code 12) at io.c(165)

In this particular case, I ran "rsync --recursive --links --hard-links 
--times --verbose --delete --timeout=600 
rsync.jp.gentoo.org::gentoo-portage/  
/home/mirrors/ftp_root/sites/gentoo/".  On the other hand, when I rsync 
against some sites such as rsync.au.gentoo.org, I rarely get such errors.

For my rsync daemon, I run it as "/usr/bin/nice /usr/bin/rsync --daemon 
--compress --safe-links --bwlimit=400 --timeout=600" where the 
appropriate stanza in /etc/rsyncd.conf is

    [gentoo-portage]
            comment = Gentoo Linux Portage tree
            path = /home/mirrors/ftp_root/sites/gentoo
            read only = yes
            use chroot = true
            list = yes
            uid = sync
            gid = sync

 From some places, rsyncs to myself get errors similar to the following:

    write failed on /tmp/mirstat.temp.K2gzyR : Bad address
    rsync error: error in file IO (code 11) at receiver.c(271)
    rsync: connection unexpectedly closed (798 bytes read so far)
    rsync error: error in rsync protocol data stream (code 12) at io.c(150)


I'd be very grateful if anyone can shed light on why this is happening.  
Is my version of rsync somehow incompatible with some versions?  Does 
the debian rsync package have known problems? (on the latter, I alien'd 
the redhat rawhide rsync 2.5.6-4 package, and got the exact same 
problems, so it may not be a debian package-specific issue).
 
Thanks in advance...