Summary of the problem Water not flowing correctly or updating properly. Pack Version 1.5.3 What is the bug? Some mod in this alters the way the water flow physics work, because if I try to turn off a water flow by blocking it's source off, then the water flow does not despawn sequentially like it's supposed to. There appear to be blocks of water generated by some mod which resemble flowing water but persist and cause Minecraft to stop processing the despawning of water that was flowing from a source block that is no longer present. Seed: 1249369636012099987 Around the spawn of the above seed there are blocks of flowing water originating from source blocks in an Extreme Hills biome, some of them turn off properly, others do not. Mod & Version Unknown at this time. Link to log file http://paste.feed-the-beast.com/view/f0c95411 Is it repeatable? It persists after trying to generate a new world so I'd reckon it is persistent. Known Fix Unknown.