Plausible Cause: java.lang.ClassNotFoundException: mods.railcraft.common.plugins.craftguide.EmblemRecipesPlugin

Console Spam: http://pastebin.com/qaVQnBZU

Seems Railcraft doesn't like my modpack anymore.

It's caused by CraftGuide api. The emblem class called it and caused the bug. CJ may have a look.

And you are using an official build of Railcraft? Not something cobbled together from GitHub?

I need to see the FML Logs.

Citing lack of response, I'm going to close this.