Version: 1.0.2 What is the bug: Traveling west from spawn is an unused extreme hills chunk that causes any clients who approach it to crash. A block or blocks in this chunk are causing clients to crash. There are no player constructed blocks here, it is all world gen. The error indicates it is trying to reference an array index of 6 to render a block that only has an array index of 0-5 Disabling fastcraft did not resolve this issue. Game hosted on dedicated server. This world was generated on infinity 1.0 and updated as new releases come out. Mod & Version: Advanced Solar Panels Paste.feed-the-beast.com log: http://paste.feed-the-beast.com/view/e09f0fd8 Can it be repeated: Yes. Approach the chunk. Known Fix: Reduce render distance and leave the area.