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So my FTB crashed. I was just placing dirt blocks so I have no idea what could have caused it. Here is my crash report: http://pastebin.com/HELtz3Jw. I'll provide you with any more info you may need.
Hm. When did you grab Eyamaz's JVM arguments? They don't match his current set up in his thread; perhaps try updating your JVM arguments? You could also try updating to Java 1.7.0_51 x64. Hopefully between those two, it'll sort things out for you.