The setup
Bring about an XP orb in some way. Kill a slime, mine a coal, I don't care.
What I expected:
XP orbs would float and flutter at an enjoyable, lively distance above the ground (as they had until 14w05b)
What actually happened:
They scrape along the ground, as if exhausted, drained of life (as of 14w06a)
Ron Swanson's Voice indeed.