rvn4fun,
Atwood supplies that particular ladder to Heartland. I understand they've acknowledge and addressed an issue "with a few ladders produced in late 2009/early 2010 that exhibited cracks". If you or anyone reading this, need a few replacement end caps or wish to further discuss your matter with Atwood directly, please phone them at 866-869-3118.
Jim
Jim, thanks for the tip, it worked for me. They are sending me what I need (replacement end caps) at no charge.