There's an errata update for 6.2 - xpdf-0.91-1.6x
7.0 ships with xpdf-0.91-1
Because RPM considers the errata update to be of a lower version than the
7.0 release, the upgrade path in the installer winds up not upgrading the
xpdf package with the 7.0 version, that contains FHS-compliant install
This problem is fixed in xpdf-0.91-2.