If you place a painting you won't be able to see them, If you exit the world and start it again then they will show up.
Video: http://youtu.be/DJSpHQYXcGE
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Ah, I didn't see that sorry. Would it be possible to show all the current bugs from Minecraft>Versions>Minecraft 1.5 ?
Duplicate of MC-11236, please use the search function to see if your bug has already been submitted. Currently over 53% of tickets are being closed as duplicate.