I really hope that's not the case. I know they needed to prevent players from having technical blocks in their inventory, but other technical blocks still spawn into the world, the same as they always have. Case in point, "Block 36" is able to be spawned with "/setblock ~ ~ ~ minecraft:piston_extension", but is no longer a valid block with the "/give" command (because you can't store technical blocks in player inventory, or storage).
I was using Active Redstone Lamps to make "wireless" lighting in my buildings, as well as in one of my current projects, so losing the ability to spawn them is kind of painful.
I find it really weird that the "FallingSand" version of "Block 124" still works perfectly, but the properly named "lit_redstone_lamp" doesn't.
Thank you for responding, and I hope it's just a bug, and will eventually be restored.
I can confirm. This happens in both Minecraft 14w04a and 14w04b, regardless of which face of a block I place the Item Frame on (North, East, South or West).
I'm running Windows Vista (64-Bit), using Java Version 7 Update 51.
I can confirm what Gary Closse has stated, that this bug still exists in the current snapshot (14w10c). I'm not sure if Dinnerbone, or Grumm, or anyone else is checking on this bug (I doubt it), but it is weird that the Redstone Lamp is the only block in the group that doesn't show its "active" form, with the /setblock command.