Description of problem:
The postinstall scriptlet contains a syntax error:

# rpm -q -scripts xsane-gimp
postinstall scriptlet (using /bin/sh):
if [ -x "/usr/sbin/gimp-plugin-mgr"]; then
    /usr/sbin/gimp-plugin-mgr --install xsane
fi

Note, there is a blank missing between the '"' and the ']' on line containing
the 'if'.

This causes yum-updates to fail:
  Updating  : xsane-gimp                   ####################### [ 8/24]
/var/tmp/rpm-tmp.95854: line 1: [: missing `]'
...

Version-Release number of selected component (if applicable):
xsane-gimp-0.991-3.fc5

How reproducible:
Deterministic