Never happened before in CM4 to me, but my club actually switched its home ground after I had been promoted from the Conference with Margate. There wasn't any announcement at all in the news section, though!
They moved from their old ground (Crabble Athletic Ground, Dover) to one that is actually in their home town (Hartsdown Park, Margate). I don't know what the point of moving was though as the capacity of the new ground is >1000 lower (went from 6500 to 5315).
Anyone else had this happen to them before?