Doing a specific procedure to signs will make them ghost blocks, which will disappear after you reload the map. Since it's hard to explain the bug, I made a little map which tells you exactly how to reproduce it.
Just follow the instructions.
http://www.mediafire.com/download/wvsb3to40e25rgd/Ghost+Sign+Blocks+Rendering+Bug.zip
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No, this doesn't duplicate MC-66425. This is a different glitch. Whoever flagged this, did you check the map that shows you the bug first? I doubt it. Also this glitch only happens to signs (as far as I can tell), not to "polished granite" or something like that…
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Linked the correct one.
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I'm sorry, that's also not the right one. Please, before you flag my issue, read through the text and try out the map. Please don't assume what this bug is.
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Are you still there?
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This bug happens to only signs. MC-62166 happens to all blocks.
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Exactly. That's why the two should be kept seperate.
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No chance, they are mods.
They do what they want and since mojang is too stingy to actually hire a full payed employee who knows what he does, nothing will change.
I think we should report this whole fact as a bug.
Solution:
Hire a qualified person, who is trained for this job (payment based work should raise the quality).
The employee sorts bugs regarding priority and actually assigns it to a developer.
He has contact to the mojang team and asks them if needed whether bugs are dupes/invalid
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Exactly what I thought.
How are we gonna get these bug separated though? It may be hard, but this bug is quite an important one to be honest. Re-post it?