I haven't had this problem ever, this is the first time. I start up my modded minecraft as usual and I get a crash, I try again, same crash, I check the files, they're all fine. This is what I get:

 

---- Minecraft Crash Report ----

// Sorry

 

Time: 8/11/13 8:40 PM

Description: Failed to start game

 

java.lang.NullPointerException

at net.minecraft.client.gui.FontRenderer.getFontTexturePack(FontRenderer.java:1144)

at net.minecraft.client.gui.FontRenderer.func_98306_d(FontRenderer.java:222)

at net.minecraft.client.gui.FontRenderer.func_98304_a(FontRenderer.java:150)

at net.minecraft.client.gui.FontRenderer.<init>(FontRenderer.java:112)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:407)

at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)

at net.minecraft.client.Minecraft.run(Minecraft.java:732)

at java.lang.Thread.run(Unknown Source)

 

 

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

 

-- System Details --

Details:

Minecraft Version: 1.5.2

Operating System: Windows 7 (amd64) version 6.1

Java Version: 1.7.0_21, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 453243872 bytes (432 MB) / 648740864 bytes (618 MB) up to 954466304 bytes (910 MB)

JVM Flags: 2 total; -Xms512m -Xmx1024m

AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

Suspicious classes: FML and Forge are installed

IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0

FML:

LWJGL: 2.4.2

OpenGL: Intel® HD Graphics Family GL version 3.0.0 - Build 8.15.10.2291, Intel

Is Modded: Definitely; Client brand changed to 'fml,forge'

Type: Client (map_client.txt)

Texture Pack: Default

Profiler Position: N/A (disabled)

Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

Sounds like a optifine issue to me as that function doesn't exist in vanilla or forge.

In 1.5.2 be sure to install optifine AFTER forge.

Either way we officially don't support jar mods.

Thanks, that fixed it. BACK TO MODDING.