Earlier today (I think!) I OK'd a bundle of updates and now the "switcher", which previously allowed applications to be dragged to another workspace tab, is messed up. Previously the same desktop contents was reflected on each workspace. Now the others are devoid of anything.
How can I un-do a recent update? And if not, is there documentation associated with the release of general bundled updates that are done periodically? In other words, can I at least find out what was done to screw up my desktop so?