>>I'm using = Grid Highlighter by Nick Neklioudov - I don't know whether that would be causing a problem
>
>It stands to reason that such a tool would use some "Dynamic" properties. I don't know this particular tool, though, nor do I know why it would suddenly fail.
See if you can deactivate it - and what are the results.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)