With the seed -5434475886538122676, I couldn't find the strongholds at 1 (-228,-952) or 3 (-972, 800), but 1 was near an abandoned mineshaft. I didn't check number 2 (912,452).
EDIT: Found the one at the first coordinates, around 50 blocks to the east of where you predicted. Didn't find the entrance, though.
I'm having a lot of trouble getting redstone torches to propagate downward. It works if you manually place and un-place the torch, but the propogation from the switch does not go downward.
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EDIT: Found the one at the first coordinates, around 50 blocks to the east of where you predicted. Didn't find the entrance, though.
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Can you explain this in the context of my pictures? I'm not sure I get how they're supposed to work.
EDIT: Here's a much ore clear example of what I'm seeing:
http://i.imgur.com/L522U.png
Why is it still extended?
EDIT2: Another picture.
http://i.imgur.com/ZYbZE.png
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Pictures here: http://imgur.com/a/PCzp7