Sideway placed blocks (quartz, hay bales, wood logs) textures are not rotated properly

Textures are not rotated properly on sideway logs. This is most noticeable on birch logs (see pictures).

15w44b:

Still affects the bottom of rotated blocks (wooden logs, quartz/purpur pillars, hay bales), see newest attached screenshot.
Suggested fix:
Replace

   "down": { "uv": [ 0, 0, 16, 16 ], "texture": "#side", "cullface": "down" }

with

   "down": { "uv": [ 16, 16, 0, 0 ], "texture": "#side", "cullface": "down" }

in models/block/column_side.json