I've looked up this bug and apparently it's 'fixed' but I've seen it has occurred again. There are floating torches on a village lamp post (1st screenshot) and just round the corner is another lamp-post with a missing fence at the bottom (2nd screenshot). The world is a super-flat world with dirt 3 deep, bed-rock at bottom, cheats allowed, and villages/dungeons etc allowed to render.
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42nd Duplicate of MC-2512, please use the search function to see if your bug has already been submitted. Currently over 54% of tickets are being closed as duplicate.
On my 1.5 the torches properly attached. However, some posts were missing one torch.