To reproduce:
$ cat foo
Convert "enum svn_node_kind" to the newer "svn_node_kind_t", across
all the code.
$ svn pl -r 3647 http://svn.collab.net/repos/svn/
Unversioned properties on revision 3647:
svn:log
svn:author
svn:date
$ svn ps -r 3647 svn:log -F foo http://svn.collab.net/repos/svn
kfogel's password: **********
subversion/libsvn_ra_dav/util.c:81: (apr_err=175002, src_err=0)
svn: RA layer request failed
svn: applying property change to to /repos/svn/!svn/bln/3647: 409
Conflict
$
Now, that ain't right...