I have a hrel 6 installed and configured to use the pt_BR (Brazilian Portuguese) language. stap-prep script uses grep to look for the string 'is not installed' and the rpm tool installed is writing this information in portuguese, so the script doesn't find the packages to be installed. I think that this problem will also happen in hrel installation in other languages, I also tested this in fedora 16 and I got the same error.
Could you try adding a LANG=C; export LANG to the top of the script, and see if that works? If so, please include it here as a patch and we'd be happy to merge it right away.
Yes, it is works. Thanks
Created attachment 6178 [details] patch to fix the problem
commit cdd7ce2