The infrastructure update introduces a Search Administration page on the Shared Services. When creating a slipstream installation, this page is automatically created when creating the Shared Services. But when you install the Infrastructure Update on an existing environment, this page is not automatically created. It does change the breadcrumb trail on the Search pages of the Shared Services site, which cause some error messages. You cannot open the “Search Administration” page (http://<ssp_url>/ssp/admin/searchadministration.aspx).
To solve this, run the following commands:
stsadm.exe -o installfeature -name S2SearchAdmin
stsadm.exe -o activatefeature -name S2SearchAdmin -url http://<ssp_url>/ssp/admin -force