Using Mariculture-Deluxe-1.7.10-1.2.4d-13.jar, in Regrowth 0.6.5. I open the crucible's GUI and quickly shift-click some iron ore into it, and it crashes. As it crashes, the item name of the iron ore shows as 'Unnamed'. When I reload, the item name is correct again, and shift-clicking the same iron ore works normally. There's also a lot of lag when you open the GUI, and everything in your inventory is called 'Unnamed'. once/if normal names return the lag goes away, and shift-clicking works.

After testing for a little while, the lag gets worse and worse, and items not ever getting their normal names

http://pastebin.com/BFtU7tKK

And just testing now, it's generated over 100MB of this in the fml log: http://pastebin.com/xxtt1JiG