When i try to download the mindcrack modpack on feed the beast I get this error if you need the full report ask in this thread
2013-05-04 16:24:18 [iNFO] [sTDERR] [16:24:18] [ERROR] FMLRelauncher.setupHome:175->MinecraftLauncher.main:214: Unhandled error launching minecraft: java.lang.RuntimeException: java.lang.NoClassDefFoundError: com/google/common/collect/Multimap
cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:175)
cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:242)
cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:212)
net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)
net.minecraft.Launcher.init(Launcher.java:85)
net.ftb.mclauncher.MinecraftFrame.start(MinecraftFrame.java:149)
net.ftb.mclauncher.MinecraftLauncher.main(MinecraftLauncher.java:208
