pumpkins and melons dont grow if there is a block above the stem

buffet mode cave world puts the player above bedrock after death

kelp grows into flowing water and converts it to full water

Cartographers don't unlock correctly in the End/Nether

olds main islands in the end are destroyed with the new end pilars and dragons

The new end in 1.9 is hostile towards old worlds (and no good enough for new ones)