Hi Nick,
Our centrally-managed laptops indeed push compatibility view for intranet websites, but disabling this option doens't change anything about the problem. Which is (as you stated) normal since the x-ua-compatible headers have a higher priority.
Unfortunately the notes don't apply for our system. Our EP-RUNTIME version is NW 7.40 SP11 patch 17, so these notes should already be included.
Best regards,
Maarten