also, have you ever noticed how the best songs seem to be on the last cut?  the angle of attack gets more severe as you move inward and more energy is squeezed from less groove space.  not an uncommon problem, however, you will find that very careful attention to setup will help.  also, it has been my experience that the carts with smaller needles handle this better.  linear tracking arms were thought to be a solution to this problem and some are great, but the cause of the problem still exists regardless of arm or setup.

tom