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I've build a retractable staircase. But, on the right side, the sticky piston stays in the open position. Does anyone know why?

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http://imageshack.us/photo/my-images/193/20120106103704.png/

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Without seeing the mechanism you've created it's going to be difficult to suggest why it's not working. A short video showing what you've built and the problem might go a long way here. –  ChrisF Jan 6 '12 at 9:45
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A couple of screenshots will be fine too. –  Olegs Jeremejevs Jan 6 '12 at 10:12
    
A possible problem may be that redstone current only travels through 15 blocks of wire. It's impossible to tell without seeing what you're doing though. –  fredley Jan 6 '12 at 10:50
    
Redstone is working and powered. I've uploaded a few screenshots. –  The_cobra666 Jan 6 '12 at 11:36
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We'll need pictures on the redstone on the right side to find the source of the problem... –  DemonicMushy Jan 6 '12 at 12:43
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3 Answers

Sometimes when large amounts of pistons are being used, some will not update.

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I've made a demo replica of your construction, in all possible orientations:

I can't imagine what can be wrong in such trivial design. Do you have the latest Minecraft? Any mods installed? Any redstone wiring/torches underneath the staircase?

UPD Changed the video, the old one is here.

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I notice that yours is an extra block wide; that might make the difference if this is one of the "piston quasiconnectivity" glitches. –  Kevin Reid Jan 6 '12 at 14:48
    
There is no difference, just tested, isn't worth a video. –  Olegs Jeremejevs Jan 6 '12 at 15:24
    
you also might want to test if the directionality of the stairs matter. –  alexanderpas Jan 10 '12 at 16:11
    
I've updated my video. –  Olegs Jeremejevs Jan 10 '12 at 16:58
    
+1 for research. I notice one difference though: the original design has a layer of stone blocks above the pistons and the retracted stairs, so maybe that causes trouble. Or maybe the positioning of the switch at the bottom of the stairs is relevant as well? –  Zommuter Jan 10 '12 at 20:48
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You seem to be the victim of the piston update bug. when large contraptions update the pistons do not seem to respond. (if you look up Captiansparkles on youtube he runs into the same problem in one video) try building the same contraption in another place and see if it works or a different set of pistons refuse to update.

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