Aizen

OK, first - try the new forge. You're running the 7.7.0.582 build, get the newest one (7.7.0.589). It seems to be working for many people. Second, as LexManos said: "1.4.7 mods DO NOT work with 1.5." So make sure that all your mods are up to date. I don't know how you install your mods, but using Magic Launcher helped me. It lets you add 1 mod at a time. It might help you to work out, which mods are causing a BS.

Hi guys! I had the same problem. This is what I did: 1. I got a fresh copy of Minecraft 1.5 2. Downloaded the newest forge form http://files.minecraftforge.net (7.7.0.589) 3. Opened minecraft.jar and deleted META-INF 4. Copied Forge files to minecraft.jar (DO NOT DELETE THE META-INF FOLDER) That worked for me. If you're using MC Patcher, make sure you have the latest one, and use it after you install Forge. And people, listen to diesieben07! Next time post the log. It's the "ForgeModLoader-client-0" document located in your .minecraft folder.