tuxguitar crashes when using the matrix editor for percussion track

[marchetr]

/dev/sequencer: No such file or directory
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00324f9f, pid=3008, tid=3079146352
#
# JRE version: 6.0_23-b23
# Java VM: OpenJDK Client VM (20.0-b11 mixed mode, sharing linux-x86 )
# Derivative: IcedTea6 1.11pre
# Distribution: Ubuntu 11.10, package 6b23~pre11-0ubuntu1.11.10
# Problematic frame:
# C [libgdk-x11-2.0.so.0+0x35f9f] gdk_window_object_get_type+0x60f
#
# An error report file with more information is saved as:
# /home/riccardo/hs_err_pid3008.log
#
# 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.
#
Aborted

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jens Nitschke (jens-nitschke-clan)]

~$ tuxguitar

(java:6634): Gtk-WARNING **: Im Modulpfad »pixmap« konnte keine Themen-Engine gefunden werden,
/dev/sequencer: Datei oder Verzeichnis nicht gefunden
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fa2009c5b9c, pid=6634, tid=140333877159680
#
# JRE version: 6.0_30-b12
# Java VM: Java HotSpot(TM) 64-Bit Server VM (20.5-b03 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C [libgdk-x11-2.0.so.0+0x3cb9c] __float128+0x5fc
#
# An error report file with more information is saved as:
# /home/jnitschke/hs_err_pid6634.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Aborted