Description of problem:
There are a couple of parts to the problem. One is that 'touch' is used without requiring coreutils for the postin and postun scripts. The other is that gtk-update-icon-cache is supposed to be used in a way that will work if gtk2 isn't installed. The typical idiom given to me was:
touch --no-create /usr/share/icons/hicolor
if [ -x /usr/bin/gtk-update-icon-cache ]; then
  /usr/bin/gtk-update-icon-cache --quiet /usr/share/icons/hicolor || :
fi
In addition you'll want to add these requires to the spec file:
Requires(post): coreutils
Requires(postun): coreutils

Not doing the above can cause problems when doing fresh installs or build live cds. Whether or not problems show up in a specific case is somewhat random depending on the order that packages get installed.

Version-Release number of selected component (if applicable):
powermanga-0.90-3.i386

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