I would like to address a bug I have found involving flower pots.
I have only found this using Moon/Oxeye Daisies, but I'm pretty sure it applies to other things as well.
When you place something in a flower pot and break the block the flower pot is ON, you recieve TWO of the item that was in the flower pot and one flower pot.
i tested it too. It does happen. It will drop one flower pot and two flowers.