The Optifine mod is not compatible this modpack??? My optifine is graphic glich. The carpenter blocks is INVISIBLE....
Optifine does this for my computer also. This is not the only mod pack that it happens for me. I downloaded Fastcraft and have great success with this one. This may be something to try if Optifine glitches the Carpentry blocks on your computer. My co worker could barely move his char while playing on my laptop but with fastcraft, he moves just fine.