Phew, glad im not the only one ! Thanks jjyotk, lis610. Strange about test patterns, my fear is spending a lot of time designing something in LB and not being able to fix it!
Has to be something in the lbrn file im guessing.
Did a simple test pattern the other day with the same settings but with just simple shapes. Thought i might have too many layers in the original but this turned out fine.
Just managed to test this out on a friends 50w laser today and the same thing.
Only difference is its not shifting over to the left as far as the original . Still moving at the 20% mark though.
Like i say, have sent files to devs so hopefully they can figure it out but only have 12 days left of the trial so time is ticking away!
Shame coz i was hoping to use LB instead of inkscape to design (im not very good with design and LB seems more intuitive).