Gimps question: Selection lines remain visible

[Joel Hammer]

I have an odd problem.

Here is how it comes about:

I use the free hand selection tool to outline an object. I invert the
selection and hit cut. This is supposed to removed garbage from the picture
background while keeping the object in the picture.

After the cut command, I am left with the fine white line which outlines the
object. I can erase it, but, is there a way to avoid this problem. Is this a
feature?

Thanks,

Joel