The template files for InDesign contain a layer "xx Grid" where the column placeholders reside on. The way these placeholders are formatted (filled with RGB Red and set to an opacity of 10%) leads to weird display behaviour when InDesign does quick/preview renderings (e.g. while dragging/moving some page items around) of the actual spread while using display quality "highest" (dunno the exact wording).
It's not critical in any way because it disappears after the the "final" view is rendered ... just irritating and little bit annoying when doing layouts.
This of course only works when you have the grid layer in the background.
Instead of decreasing the opacity value (= transparency effect, what leads to that behaviour) down to 10%, keep it at 100% and decrease the tint to 10% instead.
Yes, I will. Plus a ID CS6 template on top! ;-)