Board Thread:Questions and Answers/@comment-86.186.19.220-20130411163446/@comment-3552584-20130411223920

I believe that dense ores has been adjusted. I know that nether ores will no longer spawn in dense ore ages, and it appears that the normal height-restrictions for the ores spawning is back. There is, however, a lot more ores, especially the closer to bedrock you get, as I have seen large clusters of 12-16 diamonds kinda frequently, when I was checking on my 64x64 quarries I set up in my dense ore age. Oh, and I also have disabled instability in my config.