When using an iron door it doesn't update when being powered first without a block update. The video file is too large, so here's a link to a video showing the bug: http://youtu.be/XC9cF1m7b6U .
MC-69156
Iron Doors Not Updating When Powered First Without Block Update
Resolved
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0
Duplicate of MC-2298
It's much better to do a search before posting and add your info to the original report.