pygrub tries to write to /var/run/xend/boot which only exists in the main xen package, not the xen-runtime package
Changing version to '9' as part of upcoming Fedora 9 GA. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Built into xen-3.2.0-12.fc9
xen-3.2.0-12.fc9 has been submitted as an update for Fedora 9
xen-3.2.0-12.fc9 has been pushed to the Fedora 9 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with su -c 'yum --enablerepo=updates-testing update xen'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F9/FEDORA-2008-5053
*** Bug 450729 has been marked as a duplicate of this bug. ***
xen-3.2.0-12.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.