Latest update no longer suffers the bug as items aren't flattened by default.
As such this is technically considered fixed.
If Sphax does any addons to re-add flattened items I'm sure he'll make sure the compass isn't still broke and if not chase Mojang about it
[Minecraft Bug] Compass & Clock spinning in 14w30c Pack
Profile pic by TsaoShin: https://www.deviantart.com/tsaoshin