IPR is acting weird with the scene I’m working on at the moment. It updates every time I select an object in Perspective viewport. In Camera and orthographic views this doesn’t happen.
Are there any Loft objects in the scene or anything else different from regular 3ds Max meshes?
Best regards,
Vlado
I’m not sure but after I collapsed all objects to editable mesh the problem went away. I’ll try to pinpoint the offender and report if I find it.
EDIT: Actually, scratch that. It happens even with collapsed editable mesh objects and clay materials on all objects but now it refreshes mostly when selecting the cameras and one particular object in that scene whereas before it refreshed when selecteding anything.
Another scene with the same problem. This time just selecting vray lights refreshes IPR. 
I will need that scene then. You know what to do 
Best regards,
Vlado
Done, you should already have it.