Sharepoint 2007 breadcrumb includes default.aspx

Are you seeing default.aspx after Pages in your SharePoint breadcrumb navigation?

I found a simple fix for this problem in MOSS, modify the master page.

Open the master page and look for PlaceHolderTitleBreadcrumb

Change SiteMapProvider="SPContentMapProvider" to

SiteMapProvider="CurrentNavSiteMapProviderNoEncode"

To quote from my reference

When you’re creating a new Page Layout, make sure you override the Title Breadcrumb with something that uses the CurrentNavSiteMapProviderNoEncode provider.

Heather Solomon has written a great post detailing the behaviour of out of the box page layouts breadcrumbs. She has also linked to other resources for how to modify and use the breadcrumb.