Minecraft crashes while loading (before it even gets to the main menu). The error seems to be related to the JNA native library. I noticed that there's a jar for version 3.5.1 in the mods folder that gets loaded by Forge, but the version I have installed on my system (Ubuntu 12.04 64-bit) is 3.2.7-4. I wiped out the .skcraftalice folder and let it do a fresh update, and I still had this issue. The crash report can be found here: http://hastebin.com/luceraqeqo.coffee One of the suggestions in the crash report is to set the system property jna.nosys=true. Adding the flag '-Djna.nosys=true' to the JVM arguments under the Environment tab for the Alice config in the launcher seems to solve the problem, but I imagine there is a better solution for this issue.