I get strange UV unwrapping behavior when Unwrapping any object that has Seams.
In the example below, I show the results of Unwrapping a simple beveled cube with and without Seams.
I understand that strange results can be shown in a UV Editor window if the scale of the object is not uniform. However, the scale of my object has not been changed and is at 1 in the example. If anyone knows what causes such a dramatic effect and has a solution then please let me know, because this problem is effectively making it impossible for me to texture my models properly.