MS Wheel
In the MS marketing world, reinvention of the "wheel" would be:
Beta 1: The wheel is triangle.
Beta 2: Great improvement: it's now a square wheel.
Beta 3: Again, great improvement: the square wheel has round angle.
First Release: Round angles where cut straight so the wheel is is now an octagon.
Service Pack 1: The angles where smoothed, but this SP introduces a bug: the wheel is now an oval.
SP2: Reduce the elliptical shape but introcuce a new bug: the wheel is now a cardioid.
MS Wheel's life continues: