This posts issue seems to be solved as of Snapshot 14w25b, but the issue with it not outputting signal of an item's angle in the item frame with a block such as a button, torch, vine, or ladder is still an issue as of 14w25b. The post said as duplicates explain this in more detail.
This posts issue seems to be solved as of Snapshot 14w25b, but the issue with it not outputting signal of an item's angle in the item frame with a block such as a button, torch, vine, or ladder is still an issue as of 14w25b. The post said as duplicates explain this in more detail.