Fixing the Shrink bug

If your camera is stuck in the "crouched" position after updating to 1.6.11:

1. Download and install NBTExplorer
2. Open NBTExplorer, then find your level.dat in saves/<save name>/level.dat (or world/playerdata/<uuid>.dat file for servers) and drag it into the window.
3. Navigate to level.dat > Data > Player > ForgeCaps and find shrink:shrunk. Select it, click the red X in the toolbar to delete it.
4. Ctrl + S or click the save icon in the toolbar to save your changes, then close NBTExplorer.

You should now reset to default camera position when you open your world.