I'm trying to launch the Ivan 1.7 pack with increased memory limits from the defaults, and the launcher doesn't appear to be taking them into account, or rather, they are being overridden by what looks like hard-coded default values of -Xmx1536M and -Xms512M, as can be seen in the truncated log at http://pastebin.com/eUYrJ88P. I know that in general when there are duplicate JVM flags the last versions are taken to be accurate, and so the client is launched with a maximum of 1536MB allotted. This isn't enough for a pack of this size, and so it is running out of memory before it even hits the main menu (in all cases due to running out of heap space). I have tried several different memory limits and I have explicitly included them in the "JVM arguments" of the launcher's options, and I can confirm that I am running 64-bit Java with no set runtime parameters for either my system or my user.