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Bug
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Resolution: Works As Intended
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None
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1.9.0.3 Beta
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None
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Creative
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Unconfirmed
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Android
Water can't flow through fences, iron bars, stairs, half slabs placed on ceilings, etc. but you can place water down on the block they're in, they just won't flow to the rest of the blocks, or through it. If you make a half slab tunnel, placing water on the ceiling of the half slab would just have the water float in mid-air above the half slab underneath. Hopefully this helps!