Error during 'svn export' over http with serf 1.3.1

I get an error when exporting
http://svn.apache.org/repos/asf/subversion/tags/1.8.3, with trunk@now
+ serf 1.3.1:

[[[
svn export -q http://svn.apache.org/repos/asf/subversion/tags/1.8.3
..\..\..\subversion\svn\export-cmd.c:127,
..\..\..\subversion\libsvn_client\export.c:1441,
..\..\..\subversion\libsvn_client\export.c:1334,
..\..\..\subversion\libsvn_ra_serf\update.c:2978,
..\..\..\subversion\libsvn_ra_serf\util.c:2186,
..\..\..\subversion\libsvn_ra_serf\util.c:2167,
..\..\..\subversion\libsvn_ra_serf\update.c:1147: (apr_err=120104)
svn: E120104: ra_serf: An error occurred during decompression
]]]

It doesn't happen always, but say 8 times out of 10 (in different
places during the export).

I haven't been able to reproduce it with serf 1.2.1, nor with serf
1.3.1 via https. Only with serf 1.3.1 exporting from http.

-- 
Johan