MCPatcher
After the patch of 1.3.1, I installed MCPatcher. From that moment, I got this error:

So I did what it told me to do, and after installing the brand new .jar file and deleting META-INF folder, I ran it again, but it still gave me that same error. It's still happening today, and I think that's reason why some mods that are compatible with OTHER mods are not working. I tried putting them manually in .jar file myself, but it still didn't work, but the mods are compatible with each other....

So I did what it told me to do, and after installing the brand new .jar file and deleting META-INF folder, I ran it again, but it still gave me that same error. It's still happening today, and I think that's reason why some mods that are compatible with OTHER mods are not working. I tried putting them manually in .jar file myself, but it still didn't work, but the mods are compatible with each other....
