On more careful examination, the two links that remain unbroken by Chris' code are on the Slide Master. When I right-click them, they are listed as Linked Worksheet Objects and point to two cells with dates in them.
When I added this code, it neither listed the objects nor deleted the links. Thoughts??
Code:
For Each shp In ActivePresentation.SlideMaster.Shapes
On Error Resume Next
Debug.Print shp.Parent.Name & " | " & shp.Name
shp.LinkFormat.BreakLink
On Error GoTo 0
Next shp