All the other check boxes work fine (Trail, Follow, Flags, Shaded, Filled), but the 'Change' box does nothing, nothing is highlighted when the values are altered.
It got broken when I split the map grid and the panel underneath into two separate parts. That was quite a while ago. Anyway I've fixed that up tonight by making sure the tickbox modification gets noticed by the grid code. Should be a version in several weeks. I'm full time on code changes at the moment