再現しまへん。Log を見る限りでは <= r2951? に対策 code が入ってないはずだけど、

jun@debian /dvl/uim/org/trunk
$ svn up -r 2951
Enter passphrase for key '/home/jun/.ssh/id_dsa':
At revision 2951.
jun@debian /dvl/uim/org/trunk
$ tail -n 13 uim/uim-helper.c
int
is_setugid(void)
{
  uid_t ruid = getuid();  /* real uid */
  gid_t rgid = getgid();  /* real gid */
  uid_t euid = geteuid(); /* effective uid */
  gid_t egid = getegid(); /* effective gid */

  if (ruid != euid || rgid != egid) {
    return 1;
  }
  return 0;
}
jun@debian /dvl/uim/org/trunk
$ ./autogen.sh
/usr/share/aclocal/libmcrypt.m4:17: warning: underquoted definition of AM_PATH_LIBMCRYPT
  run info '(automake)Extending aclocal'
  or see http://sources.redhat.com/automake/automake.html#Extending-aclocal
jun@debian /dvl/uim/org/trunk
$ ./configure --prefix=/tmp
[...]
jun@debian /dvl/uim/org/trunk
$ make
[...]
jun@debian /dvl/uim/org/trunk
$ objdump -T uim/.libs/libuim.so | grep ugid
00014c90 g    DF .text  00000024  Base        uim_helper_is_setugid
jun@debian /dvl/uim/org/trunk
$ ld --version
GNU ld version 2.16.1 Debian GNU/Linux
Copyright 2005 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.