Luvera

Optifine causes problems on some computers. Make a backup of modpack.jar (located in %appdata%\.techniclauncher\tekkit\bin in Windows XP, not sure about other OS). Open modpack.jar with Winrar or 7zip. Delete the following files: aaw.class acq.class adz.class amd.class Config$1.class Config.class ConnectedProperties.class ConnectedTextures.class ct.class ctm.png CustomAnimation.class CustomAnimationFrame.class CustomColorizer.class GuiAnimationSettingsOF.class GuiDetailSettingsOF.class GuiOtherSettingsOF.class GuiPerformanceSettingsOF.class GuiQualitySettingsOF.class hu.class ItemRendererHD.class jy.class l.class lr.class lv.class mx.class NaturalProperties.class NaturalTextures.class nl.class nq.class RandomMobs.class Reflector.class template.natural.properties TextureHDCompassFX.class TextureHDCustomFX.class TextureHDFlamesFX.class TextureHDFX.class TextureHDLavaFlowFX.class TextureHDLavaFX.class TextureHDPortalFX.class TextureHDWatchFX.class TextureHDWaterFlowFX.class TextureHDWaterFX.class VersionCheckThread.class vl.class wc.class WrUpdateState.class zq.class Download the latest Minecraft Forge for 1.2.5 Copy the following files to modpack.jar: aaw.class acq.class adz.class ct.class l.class lr.class vl.class This fully removes Optifine. If you still have problems after doing this, Optifine was not the cause of your problems.