There is a line of black foam between the dashboard and the centre of the windscreen that every few days 'creeps' up by about an 1/8th of an inch (showing my age there!). After about a month its about a quarter of an inch (still showing my age) I'm assuming that it is sound proofing material?
Its quite entertaining really poking it back down with a knife, but how weird is that?
You are all going to notice it now........
(Its an 2011 Ex by the way)