Well I dont know if this is a common error many people get, but Im seriously getting
pissed at it. Well here it is:

When i try to apply Mesh>Booleans>Union onto two _object_s it disappear into the thin air,
heres how I doing it. First I created a simple polygon Cube, then took a cylinder and pushed
it through an edge of the cube and selected the cube first then the Cylinder and pressed in
Mesh>Booleans>Union. And it disappearded, please if someone know this problem please help me!

Thanks in advance,
Att3ro