I just smelted Thaumium in my smeltery to make a tool rod and crashed to desktop once they were done. Now I crash immediately when logging in. There are several other liquids in the smeltery - tin, molten (resonant?) ender, and blood are what I can remember. Perhaps this is the reason. Don't care much about the content, so if deleting everything inside the smeltery fixes it then that's okay with me. Here's the crash log.
Perhaps you need to just make stuff in the part builder like with most non-metals, I forgot. I didn't check on the thaumium after putting it in the smeltery. I just know that I was able to put it in, and after some time I looked at the smeltery GUI and crashed after a second. Can't login since then.
Yah, alright. Anyway, I have news: I don't only crash when joining the server, but also when entering singleplayer. However, when I join the server I get a crash log. When I join single player it's just a CTD and "Process ended with code 0" without any logs. I'm going to try saving my map waypoints and reinstalling the pack, because this is obviously not related to the thaumium.
This is a RoutableFluids issue. Before you reinstall, try changing the "Routable fluids" boolean in the Carpenter's Blocks config.
