You may have noticed that the breadcrumb bar is missing from Sitefinity 4.0. Here's how to use the stock one from ASP.NET 4.0 until it comes back.
Go to Administration > Settings.
Click "Advanced."
Drill down to Toolboxes > Toolboxes > PageControls > Sections.
Create a new section if wanted. I named mine AspNetToolboxSection.
Inside where you want it created, drill down to Tools.
Click "Create New."
Under Control Type, enter:
System.Web.UI.WebControls.SiteMapPath
Under Name, enter:
System.Web.UI.WebControls.SiteMapPath
Under Title, enter:
SiteMapPath
Save changes.
