Maybe you should check your key config for inventory tweaks. I had the same problem a few versions back when my sorting key was set to escape.server updated to 1.0.8 today and now i cant open chests,books,crafting tables. Inv. auto sorts its self every time i try to use it and removes items from hot bar.
I had the same problem and thought NetherOres or DenseOres were causing the problem. I had Biomes O' Plenty disabled as well which I think might have caused the lack or Nether Quartz because after I enabled BOP Nether Quartz seemed to generate. Hope this helps :#No nether quartz has spawned in the Nether at all for me. On versions 1.0.5/6/7. I've tried adjusting the cofh configs, and enabling/disabling NetherOres - so far nothing has worked.