The Tapland is working correctly, right? Can you give the links to the two that fail please? It's possible it's something specific about Mapquest that fails. Or perhaps, even more specifically, just a few of them.
Just for a bit more information, what I think is happening is that the Plucker parser may be choking on those two pages due to something in/on them, since (from what you said) your third (Tapland) is working and transferring correctly.