Okay - thanks for those checks. Mark just emailed and mentioned that when he has Norton Security with Ad Blocking turned on none of the images show, including the tower image on products.html.

The photos on the following pages do NOT appear (even after refreshing the
page):
M2, M3, M22, EP175, EP350, EP500

The photos on the following pages DO appear:
M50, M60, M80, QS4, QS8, VP100, VP150, EP

Anyone else running Norton?