Description of Problem:
When running "rpm --test --nodeps -Uvh XFree86-4.1.0-0.8.6.i386.rpm"
from rawhide, rpm tries to execute this trigger:

% rpm -q --triggers XFree86   
triggerpostun script (through /bin/sh) -- XFree86
for dir in lbxproxy proxymngr rstart xserver ; do
   if [ -d /usr/X11R6/lib/X11/$dir ] ; then
      cp -af /usr/X11R6/lib/X11/$dir/* /etc/X11/$dir 2>/dev/null
      rm -rf /usr/X11R6/lib/X11/$dir
   fi

   # no need to keep this symlink around any longer - pgb 06/28/00
   # these are needed for 3.x servers - notting 07/24/00
   [ ! -L /usr/X11R6/lib/X11/$dir ] && \
      ln -snf ../../../../etc/X11/$dir /usr/X11R6/lib/X11/$dir
   :
done

How Reproducible:
Always.

Steps to Reproduce:
1. rpm --test --nodeps -Uvh XFree86-4.1.0-0.8.6.i386.rpm

Actual Results:
% rpm --test --nodeps -Uvh XFree86-4.1.0-0.8.6.i386.rpm 
Preparing...                ########################################### [100%]
rm: cannot unlink `/usr/X11R6/lib/X11/lbxproxy': Permission denied
rm: cannot unlink `/usr/X11R6/lib/X11/proxymngr': Permission denied
rm: cannot unlink `/usr/X11R6/lib/X11/rstart': Permission denied
rm: cannot unlink `/usr/X11R6/lib/X11/xserver': Permission denied
% 

Expected Results:
% rpm --test --nodeps -Uvh XFree86-4.1.0-0.8.6.i386.rpm 
%

Additional Information: