Mod Pack: Direwolf20
Mod & Version: 1.6.4 (Modpack version 1.0.4), with JourneyMap 3.1.0 and Zan's Minimap 1.6.4 enabled, Opis 1.1.0 disabled
Pastebin link to crash log: http://pastebin.com/yRADhpHg (relevant section starts around line 2308)
What's the bug? Starting when I enter the Nether, the...