light bends. We are in space time and it seems to us that light is bending, while actualy it is the space and time around it which is bending. : So does that mean that Earth's movement too isn't really eliptical but linear in curved spacetime (coused by Sun's gravitation)?

We'll yes, but that's only if you like to think of it that way. You can say everything moves strait, but the plain is bent. A plain is a very simple way of thinking of it. But I just like to say it's bent, because that's exactly what we mean by the word bent. When I say something go's around in circles I don't care if it really is going in a strait line, compared to space-times non-force plain or not. Yes, you can look at it as everythings moving strait and at least 4 dimentions (space-time). Is being bent by gravitation, electromagnetic, weak and strong forces. And the ORIGINAL question is YES, gravity affects photons, they've proven it and just because something is without mass, does not mean that forces don't affect it.