Thank you for your reply, plowmanplow. Perhaps it has something to do with the fact that I changed the ore generation values for my server. I'm pretty sure I have many things set to retrogen. Perhaps it's the retrogen setting that is causing this problem?
Exploring my new tekkit server map and I cam upon a massive crater/ravine of pure black nothingness. When cows and sheep are pushed into it....They behave very strangely.