Why Would The SiteMapPath In SharePoint, Not Display All Sub Sites?

Question

I have a SharePoint with site A, which also has a nested site B, and inside of that, site C and inside of that site D.

On the home page for site D, my URL is perfect. It shows http://A/B/C/D/Pages/default.aspx But my breadcrumb shows me A > C > D

Can anyone give me one reason why this would occur in SharePoint 2010?

Thanks!

Answer 1

The user may not have permissions on site B. Navigation is security trimmed.