fontconfig's %post scripts use grep and mkdir but there is no listed dependency on these programs. When installing a system we are seeing that yum may decide to install fontconfig before grep and coreutils, which will cause the post script to not be run correctly. Originally reported at http://dev.laptop.org/ticket/11856
Fixed in fontconfig-2.8.0-7.fc17
fontconfig-2.8.0-7.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/fontconfig-2.8.0-7.fc17
The upstream report says "The fontconfig errors are harmless". Are there any issues that would indicate this needs to be fixed in Fedora 17 GOLD and not as a standard update?
Discussed in the 2012-05-18 blocker bug review meeting. This claims to be harmless error messages and could possibly result in temporary issues with building a font cache and slowing down font rendering. While unfortunate, does not seem critical and thus rejected as NTH.
fontconfig-2.8.0-7.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.