Wierd problem with high to low poly texture baking

Hello, and thanks for taking the time to read this thread.
First of all, I’d like to say I’ve been enjoying Blender, it’s a very powerful program.
But recently, I have been stumped by a problem:

another angle:

The problem is that part where the map is covering the bottom, and the white line on the second picture.

This occurs when I bake the texture from the high poly to the low poly.

This is the high poly and what it looks like:

Any suggestions?