This changeset contained 39 building-tagged polygon 'splodges' roughly where buildings are in Scotland.  And 8 not much better in Colombia.  Plus 1 fictional park area in Germany (as 1st comment) adding a node to an existing track. It also dragged nodes in Scotland (1 road junction, 1 fast food, 2 other road ends).
Nothing relating to the changeset comment and nothing of value.  Fully reverted.