What are the recent rule changes to table tennis?

I've been away from competitive TT for awhile, but still play recreationally. The most recent rule change I am aware of has to do with speed glue use. But I am uncertain as to the exact ruling - speed gluing may have been done away with at some venues. Other than that, the only other "recent" rule changes I am aware of have to do with the increase in size of the ball from 38mm to 40mm, the point change from 21 to 11, and the serve change from 5 in a row to 2 in a row. These last few changes took place a number of years ago. There may also have been changes with respect to color of rubber as applied to each side of the paddle. steve