Description of problem: We have a regression in rhn-profile-sync. As a consequence of IPv6 changes, rhn-profile-sync changed behaviour, who the hostname is reported back to the RHN. Version-Release number of selected component (if applicable): rhn-client-tools-1.6.39-1.el5 How reproducible: deterministic Steps to Reproduce: 1. Register client with Spacewalk 2. # hostname tralalabumbum 3. # rhn-profile-sync 4. Verify the hostname with Spacewalk - call system.getNetwork() API - look at the webui Actual results: The old hostname is still present on Spacewalk Expected results: The new hostname is reported by Spacewalk Additional info: In regards of reported hostname, rhnreg_ks and rhn-profile-sync seem to have different semantics.