While breaking vines or leaves on Fancy graphics, water around the cracks on the break animation is no longer rendered.

Steps to reproduce this very minor bug:

1. Set your graphics to Fancy, in order to enable leaf transparency.
2. Go to the Swamp biome or create a similar environment.
3. Go to a tree with water on the background and start hitting leaves or and / or vines.

Then you can see that the water around the cracks no longer renders.