Version: 2.4.2 What is the bug: On my server, we somtime crash in the nether. It's always at the same coordonate, and do a /back will cause a new crash after few moment. The crash is client-side only, the server doesn't crash. advsolar.common.blocks.BlockAdvSolarPanel.func_149673_e(BlockAdvSolarPanel.java:144) PS : You should add "2.5.0" in the "Version" field. Mod & Version: MC 1.7.10 - Infinity 2.5.0 Normal Paste.feed-the-beast.com log: http://paste.feed-the-beast.com/view/74ca6760 Can it be repeated: Each time you go to the same coordonate in the nether, you'll crash again! Known Fix: Unknown.