Consider the following scenario. You use SharePoint 3.0 Central Administration to create a new site collection at the root of a Web application. Then, you create one or more Microsoft Windows SharePoint Services 3.0 subsites in the site collection. Links to the top-level site and to the subsites are displayed as tabs on the top link bar of the top-level site. When you click a tab on the top link bar, the tab is selected, and you connect to either the top-level site or to a subsite as expected.

However, after you enable the Office SharePoint Server Publishing Infrastructure feature on the top-level site, you experience the following symptoms:

• The name of the tab that represents the top-level site changes. For example, the name of the tab changes from Home to the name that you specified as the title of the top-level site.
• When you click the tab that represents a subsite on the top link bar, you connect to the subsite as expected. However, the tab for the subsite is not selected. Instead, the tab for the top-level site remains selected.

When you enable the Office SharePoint Server Publishing Infrastructure feature, the name of the tab that represents the top-level site uses the title that you specified for the top-level site. This is expected behavior.

The tab selection issue occurs if the URL of the Welcome page of the top-level site is not set to /Default.aspx. Microsoft Office SharePoint Server 2007 assumes that the URL of the Welcome page of the top-level site is set to /Default.aspx.

To work around the tab selection issue, use one of the following methods, as appropriate for your situation.

Method 1

Configure the Welcome page of the top-level site to use the Default.aspx page. To do this, follow these steps:

1. Click Site Actions, point to Site Settings, and then click Modify All Site Settings.
2. Under Look and Feel, click Welcome page.
3. In the Welcome Page box, click Browse, click Default(default), and then click OK.

Method 2

Enable the Show subsites option on the top-level site. To do this, follow these steps:

1. Click Site Actions, point to Site Settings, and then click Modify All Site Settings.
2. Under Look and Feel, click Navigation.
3. In the Navigation Editing and Sorting area, click the link that represents the subsite, and then click Delete.
4. In the Subsites and Pages area, click to select the Show subsites check box, and then click OK.

Method 3

Change the navigation URL for the subsite to point to the relative URL. To do this, follow these steps:

1. On the top-level site of the site collection, click Site Actions, point to Site Settings, and then click Modify All Site Settings.
2. Under Look and Feel, click Navigation.
3. Under Global Navigation click the heading for the subsite whose tab is not being correctly highlighted, and then click Edit.
4. Change the URL so that it points to the relative URL of the subsite without /default.aspx. For example, change http://server.fqdn/sites/it/PLC/default.aspx to /sites/it/PLC.
5. Click OK.