Sorry to hear that you are sick, Jaded. Get well soon.
O.k., here goes some 2.1.7 issues.
Mariculture :
Limestone no longer smelts to give Smooth Limestone. Not good. Now my whole Titanium Factory has broken down. Smooth Limestone provided that ideal 1000mb of Quicklime. Worse than that, the NEI still says smelting Limestone gives Smooth Limestone, which it doesn't. Oh, and the NEI also now says that smelting limestone gives some lame thing called a Limestone Brick (which is, in fact, what you now get when you smelt limestone). So basically there is no way now to get Smooth Limestone at all! Among other headaches, this means that there is no way to make Bordered Limestone or Limestone Pillars. Lastly, as stated in the NEI, we can now hammer Limestone and it becomes, on average, 4.55 Limestone! Never seen that kind of trick in minecraft, modded, or otherwise.
These are not fatal bugs; simply an ongoing series of radical changes to Mariculture that have been occurring with each update to this brilliant Agrarian skies, which is why I post it here.
Ex Aliquo:
Dev probably wants to change the name of "Cobalt Ore Ore Dust" to "Cobalt Ore Sand".