planar(flat) UV Unwarping - problem

Hi! I have a very simple model of frame.

So, it can be(and i would say - must) unwarped without any stretches.
But I have this.

I tried to use Angle based and Conformal types of unwarping.
What do I do wrong?

Hi, try with Project from View, select one side unwrap, other side and than the rest with Smart UV Project.
If you change scale or other things in Object mode, apply it with ctrl + a.

Cheers, mib.