Minecraft crashed, no idea why

[Dereo]

Sorry that I'm being so inaccurate, but I can't really read the report file ... I'm attaching it so that somebody might interpret it in my place.
I'm not sure whether this has been caused by problems of the new release of Ubuntu or by other problems of the new version of Minecraft, since I've updated both of them in the last 24hs, or if it's something else.
Anyway: Minecraft just unexpectedly froze while I was playing, and I read that it was because of a bug on the terminal I used in order to launch it.
I'm on quantal quetzal, pakage openjdk-6 ... If i'm forgetting something please tell me!

[Mark (nospam366-6)]

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f405c447d95, pid=2316, tid=139914427102976
#
# JRE version: 6.0_27-b27
# Java VM: OpenJDK 64-Bit Server VM (20.0-b12 mixed mode linux-amd64 compressed oops)
# Derivative: IcedTea6 1.12.6
# Distribution: Ubuntu 13.04, package 6b27-1.12.6-1ubuntu0.13.04.4
# Problematic frame:
# C [nouveau_dri.so+0xffd95] nvc0_vertex_arrays_validate+0x545
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
# https://bugs.launchpad.net/ubuntu/+source/openjdk-6/
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

--------------- T H R E A D ---------------

Current thread (0x00007f4090764000): JavaThread "Minecraft main thread" [_thread_in_native, id=2353, stack(0x00007f405da9f000,0x00007f405dba0000)]

siginfo:si_signo=SIGSEGV: si_errno=0, si_code=2 (SEGV_ACCERR), si_addr=0x00007f405e89f000

Registers:
RAX=0x00007f405e89eff8, RBX=0x00007f402017c870, RCX=0x0000000000007fff, RDX=0x0000000000000000
RSP=0x00007f405db9df20, RBP=0x0000000000000000, RSI=0x0000000000000001, RDI=0x0000000000002be0
R8 =0x0000000000000000, R9 =0x00007f3fdb8050d0, R10=0x0000000000000000, R11=0x00007f4095ce5160
R12=0x00007f402005cc20, R13=0x0000000000001c00, R14=0x0000000000001f00, R15=0x0000000000000001
RIP=0x00007f405c447d95, EFLAGS=0x0000000000010256, CSGSFS=0x0000000000000033, ERR=0x0000000000000006
  TRAPNO=0x000000000000000e

Top of Stack: (sp=0x00007f405db9df20)
0x00007f405db9df20: 0000000000000000 00000000000003ff
0x00007f405db9df30: 00007f405c686000 0000000000000016
0x00007f405db9df40: 00007f402017c870 0000000000010000
0x00007f405db9df50: 00007f405c686000 00007f405db9e0a0
0x00007f405db9df60: 00001b0200001b02 00007f405c4402f7
0x00007f405db9df70: 00007f40201c99e0 00007f402005cc20
0x00007f405db9df80: 0000000000000000 00007f402017fe20
0x00007f405db9df90: 00007f402017c870 00007f405c44826f
0x00007f405db9dfa0: 00007f40201c99e0 00007f3fd8613b00
0x00007f405db9dfb0: 00007f40201c99e0 00007f3fd8613b00
0x00007f405db9dfc0: 00007f40201c7570 00007f401b49e605
0x00007f405db9dfd0: 00007f402017fe20 00007f40201c7570
0x00007f405db9dfe0: 00007f402017fe20 00007f401b58eff7
0x00007f405db9dff0: 00007f40201c0000 0000000000000001
0x00007f405db9e000: 00007f40200e6ed8 00007f401b8710b8
0x00007f405db9e010: 00007f40201c7570 00007f401b8710c0
0x00007f405db9e020: 00007f40201c7570 00007f3faf0111d8
0x00007f405db9e030: 0000000000000000 00007f402017fe20
0x00007f405db9e040: 00007f40201c7570 00007f3faf0111d8
0x00007f405db9e050: 00001b0200001b02 00007f401b59fa65
0x00007f405db9e060: 0000000000000000 0000000000000001
0x00007f405db9e070: 00007f405db9e0a0 0000000000000000
0x00007f405db9e080: 0000000000000000 0000000000000000
0x00007f405db9e090: 0000000000000000 0000000000000000
0x00007f405db9e0a0: 0000000700000000 0000001800000000
0x00007f405db9e0b0: 0000000100000000 0000000000000000
0x00007f405db9e0c0: 0000000000000017 0000000000000000
0x00007f405db9e0d0: 0000000000000000 00007f402017fe20
0x00007f405db9e0e0: 00007f402017fe20 00007f40200...

[Mark (nospam366-6)]

Feed The Beast a Minecraft variant. Feed The Beast- Unleashed
While playing the game it freezes up. Sometimes I can log out , most of the time it crashes xubuntu to where I have to remove power to reboot.
pid2437.log

# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f2693137d95, pid=2437, tid=139804763846400
#
# JRE version: 6.0_27-b27
# Java VM: OpenJDK 64-Bit Server VM (20.0-b12 mixed mode linux-amd64 compressed oops)
# Derivative: IcedTea6 1.12.6
# Distribution: Ubuntu 13.04, package 6b27-1.12.6-1ubuntu0.13.04.4
# Problematic frame:
# C [nouveau_dri.so+0xffd95] nvc0_vertex_arrays_validate+0x545
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
# https://bugs.launchpad.net/ubuntu/+source/openjdk-6/
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

--------------- T H R E A D ---------------

Current thread (0x00007f27046a7000): JavaThread "Minecraft main thread" [_thread_in_native, id=2470, stack(0x00007f26d5397000,0x00007f26d5498000)]

siginfo:si_signo=SIGSEGV: si_errno=0, si_code=1 (SEGV_MAPERR), si_addr=0x00007f2679bba000

Registers:
RAX=0x00007f2679bb9ff8, RBX=0x00007f269816d680, RCX=0x0000000000007fff, RDX=0x0000000000000000
RSP=0x00007f26d5495ea0, RBP=0x0000000000000000, RSI=0x0000000000000001, RDI=0x00000000000033c0
R8 =0x0000000000000000, R9 =0x00007f25c6775280, R10=0x0000000000000000, R11=0x00007f270cc8d160
R12=0x00007f2698069260, R13=0x0000000000001c00, R14=0x0000000000001f00, R15=0x0000000000000001
RIP=0x00007f2693137d95, EFLAGS=0x0000000000010256, CSGSFS=0x0000000000000033, ERR=0x0000000000000006
  TRAPNO=0x000000000000000e

Top of Stack: (sp=0x00007f26d5495ea0)
0x00007f26d5495ea0: 0000000000000000 0000000000000400
0x00007f26d5495eb0: 00007f2693376000 0000000000000016
0x00007f26d5495ec0: 00007f269816d680 0000000000010000
0x00007f26d5495ed0: 00007f2693376000 00007f26d5496020
0x00007f26d5495ee0: 00001b0200001b02 00007f26931302f7
0x00007f26d5495ef0: 00007f26981ba9e0 00007f2698069260
0x00007f26d5495f00: 0000000000000000 00007f269816fc80
0x00007f26d5495f10: 00007f269816d680 00007f269313826f
0x00007f26d5495f20: 00007f26981ba9e0 00007f2652e98230
0x00007f26d5495f30: 00007f26981ba9e0 00007f2652e98230
0x00007f26d5495f40: 00007f26981b9350 00007f26924d6605
0x00007f26d5495f50: 00007f269816fc80 00007f26981b9350
0x00007f26d5495f60: 00007f269816fc80 00007f26925c6ff7
0x00007f26d5495f70: 00007f26981b0000 0000000000000001
0x00007f26d5495f80: 00007f26980d6c58 00007f26928a90b8
0x00007f26d5495f90: 00007f26981b9350 00007f26928a90c0
0x00007f26d5495fa0: 00007f26981b9350 00007f25c51ee630
0x00007f26d5495fb0: 0000000000000000 00007f269816fc80
0x00007f26d5495fc0: 00007f26981b9350 00007f25c51ee630
0x00007f26d5495fd0: 00001b0200001b02 00007f26925d7a65
0x00007f26d5495fe0: 0000000000000000 0000000000000001
0x00007f26d5495ff0: 00007f26d5496020 0000000000000000
0x00007f26d5496000: 0000000000000000 0000000000000000
0x00007f26d5496010: 0000000000000000 0000000000000000
0x00007f26d5496020: 0000000700000000 0000001800000000
...