Glitched Graphical Errors on Edges of Blocks

Since texture pack update in 13w02a, every block in-game has glitchy look on the edge of the block. Seems to be problem meshing the separate texture together.

Ex. White edges on stone, orange on ladders.
You can see it in the screenshots.

Client is not modded, occurs on both fancy and fast graphics, smooth lighting doesn't change it. Every possible graphical setting tested, no effect. No texture pack used.

Reproducible in-game, regardless of survival or creative. Confirmed for each version until 13w05b.

Not a completely detrimental bug, but nonetheless irritating.