Minecraft Forums

When I start it up, and this was my first time starting it since 1.5.1, I only get single and multiplayer options(other choices not there). When I choose my save file, it boots me back to the title screen. When I choose my save game again, it goes to the loading screen, then I get a crash screen. The crash report reads( I hve the actual report. I'm just not sure how to put an attachment on a post. Funny. I'm not exactly new. You would think I would know these things. C'est la vie.):

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 3/30/13 12:36 PM
Description: Sending packet

java.lang.NullPointerException
at ch.b(SourceFile:107)
at ch.a(SourceFile:39)
at jh.b(SourceFile:430)
at gu.b(SourceFile:669)
at gu.a(SourceFile:79)
at bjk.b(SourceFile:73)
at net.minecraft.server.MinecraftServer.r(SourceFile:480)
at net.minecraft.server.MinecraftServer.q(SourceFile:397)
at bjh.q(SourceFile:122)
at net.minecraft.server.MinecraftServer.run(SourceFile:331)
at gp.run(SourceFile:573)


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

-- Head --
Stacktrace:
at ch.b(SourceFile:107)
at ch.a(SourceFile:39)

-- Packet being sent --
Details:
Packet ID: 4
Packet class: fh
Stacktrace:
at jh.b(SourceFile:430)
at gu.b(SourceFile:669)
at gu.a(SourceFile:79)
at bjk.b(SourceFile:73)
at net.minecraft.server.MinecraftServer.r(SourceFile:480)
at net.minecraft.server.MinecraftServer.q(SourceFile:397)
at bjh.q(SourceFile:122)
at net.minecraft.server.MinecraftServer.run(SourceFile:331)
at gp.run(SourceFile:573)

-- System Details --
Details:
Minecraft Version: 1.5.1
Operating System: Windows Vista (x86) version 6.0
Java Version: 1.7.0_04, Oracle Corporation
Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
Memory: 332582176 bytes (317 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 59237 (3317272 bytes; 3 MB) allocated, 59237 (3317272 bytes; 3 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
Profiler Position: N/A (disabled)
Vec3 Pool Size: 11166 (625296 bytes; 0 MB) allocated, 11166 (625296 bytes; 0 MB) used
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.