Got Optifine for Miniecraft 1.4.6 (correct version of optifine), installed it correctly afaik (opened with 7zip, dragged contents into minecraft.jar). At first it didn't work at all- when I tried to load, or create a world, it would say 'downloading terrain' (I'm not on or running a server- why does minecraft even need to do any downloading?) then it would crash & I'd get the purple error screen. Recently I fiddled with some optifine settings and got it to work a little better somehow, but now textures are blue, and about half a second after the world loads, performance nosedives and minecraft freezes.
I'd just like to add, my pc isn't crap- core i5 2500k, AMD 7950 and 8GB RAM, so I'm not sure why it would crash. Oh, and I'm running the latest version of java.
If i remeber correctly you also have to delete meta-inf from the zip as well, not sure entirely though because i use the magic launcher for it and its so much easier
Private Mod Note
Rollback Post to RevisionRollBack
If the Technic Launcher was destroyed, over 80% of Minecraft players would cry about it and go insane. If you are one of the 20% that would be laughing at them, copy this and post it in your signature and hope it happens
Get your saves ect... (basically backing them up) delete you minecraft jar and minecraft itselfs.. Redownload it putting the things you backed up back in.
Download magic launcher and then install your mods using that leaving your m.jar untouched.
Same thing's happening to me since installing Optifine. I'm using Magic Launcher but each time I try to start a world, I get the 'Downloading terrain' message and then it freezes. It was working fine until adding Optifine, so I'm fairly sure it's an issue with that.