When destroying TallGrass and DoubleTallGrass without shears, they drop an untextured block, or a TallGrass/DoubleTallGrass item. When holding shears, the TallGrass/DoubleTallGrass item still drops as normal.
What I expected to happen was...:
Seeds to drop from the grass.
What actually happened was...:
Either a TallGrass item, or an untextured block drops.
Steps to Reproduce:
1. Create/Join a world in either game mode
2. Place a water bucket or punch the grass (If in survival)
Environment
Put your operating system (Windows 7, Windows XP, OSX) and Java version if you know it here
Confirmed. My brother also had this happen with shears, so it might not be dependent on whether shears are used but on something else.