It seems the grass_side overlay is not being loaded for the biomes to make it change colour depending on the biome colour. This works fine in Vanilla biomes but this is not working for any biome from BiomesOPlenty.

Build: .7.2-2.0.2.932

I have attached some screenshots of the issue, the biome shown is "Decidious Forest"
Soartex Fanver: http://gyazo.com/f549d445c84b0732361ff6d21c872874
Default: http://gyazo.com/da5c1e6cbef089d53d018e7cd9cdd167

Erm, the side overlay only works in fancy graphics (In both Vanilla and with Forge). And by the looks of those Natura bushes, you're in fast graphics. I know for a fact that this does work, and this would have been noticed much sooner if it were an issue.

Huh, Never noticed that before. Sorry for wasting your time. :/