This is still driving me nuts!
Even when using matt paints I'm getting marks that show up on walls that are perpendicular to windows (eg halls and landings) where the light plays off the surface.
I roll out a metre square section and move on to the next and then do a top to bottom roll on each area but I'm still not getting a totally uniform finish. And any touching up later leaves marks that catch the light.
Is the roller 'orange peel' problem just something you have to put up with or are there ways round it? Any more tips please?!