For some reason I can no longer edit the crop of new viewports. I have compared older viewports to new ones and can't find any differences. I have scoured the setups, preferences, properties and can't find anything out of wack. The old viewports in edit crop mode come up as editable polygons, but new ones don't - it also says Crop:No in Object Info. Viewports are created on an active Class, all visiblities are on. Everything appears to but ok but i can not crop any new viewports.
What have I done to cause this and how do I fix it?