Since the upgrade my Grandmaster Gardeners have been advancing with harvests and everything was working fine. 2 are now level 11. Then yesterday (5/11/12) they stopped getting experience with harvests. I have checked all of my accounts and all of the characters on said accounts who are gardening and it is the same on all of them. No little floating message saying 5 XP, 50 XP, 300 XP etc. as there used to be. And the characters harvesting Evil Magma peas (which give 300 XP per plant) were leveling up quickly because of 6800 XP per harvest, this was a visible change to the gardening meter, but the meter hasn't moved in 2 days (my evil magma peas are harvested twice a day).
