Affects Version/s: Minecraft 15w31a
Fix Version/s: None
Environment:Mac OSX 10.10.4, x86_64, Java 1.6.0_65
Pre-Existing Potions display a pink and black marker rather than image.
When hovering it displays:
Water Bottle (#0373/88265)
I made a new fire resistance potion it was fine. #0373/0 NBT: 1Tag
I added Redstone dust. It converted back into water. #0373/0 NBT 1Tag
Poison potion with Redstone added increased duration like normal.