You can't jump one block high while standing inside a berry bush.

The bug: When standing in a berry bush, you can't jump one block high.

Steps to reproduce:

1. Place a berry bush and a regular block next to each other.
2. Walk into the berry bush. (Be careful, it might hurt!)
3. Try to jump on the block and you'll see it's impossible.

This might be working as intended, but it is quite unclear to me.