free(): invalid size message when running cgoban2 in kaffe

Binary package hint: kaffe-pthreads

Running /usr/lib/kaffe/pthreads/bin/java -jar cgoban.jar produces the
following message after a few seconds:
*** glibc detected *** /usr/lib/kaffe/pthreads/jre/bin/kaffe-bin:
free(): invalid size: 0x0806e0c8 ***

Kaffe continues running, but the UI for cgoban2 never appears.

The .jar in question can be found at
http://files.gokgs.com/javaBin/cgoban.jar

Kernel: Linux 2.6.22-14-generic (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages kaffe-pthreads depends on:
ii ecj 3.3.0+0728-5 standalone version of the Eclipse
ii fastjar 2:0.95-1 Jar creation utility
ii gjdoc 0.7.8-6 documentation generation framework
ii kaffe-common 2:1.1.7-4ubuntu1 Files shared between all Kaffe VM
ii libasound2 1.0.14-1ubuntu8 ALSA library
ii libatk1.0-0 1.20.0-0ubuntu1 The ATK accessibility toolkit
ii libc6 2.6.1-1ubuntu10 GNU C Library: Shared libraries
ii libcairo2 1.4.10-1ubuntu4 The Cairo 2D vector graphics libra
ii libesd-alsa0 [li 0.2.38-0ubuntu4 Enlightened Sound Daemon (ALSA) -
ii libfontconfig1 2.4.2-1.2ubuntu4 generic font configuration library
ii libfreetype6 2.3.5-1ubuntu4 FreeType 2 font engine, shared lib
ii libglib2.0-0 2.14.1-1ubuntu1 The GLib library of C routines
ii libgmp3c2 2:4.2.1+dfsg-5ubuntu4 Multiprecision arithmetic library
ii libgtk2.0-0 2.12.0-1ubuntu3 The GTK+ graphical user interface
ii libice6 2:1.0.3-3 X11 Inter-Client Exchange library
ii libpango1.0-0 1.18.3-0ubuntu1 Layout and rendering of internatio
ii libsm6 2:1.0.3-1 X11 Session Management library
ii libx11-6 2:1.1.1-1ubuntu4 X11 client-side library
ii libxcomposite1 1:0.4.0-0ubuntu1 X11 Composite extension library
ii libxcursor1 1:1.1.8-2 X cursor management library
ii libxdamage1 1:1.1.1-3 X11 damaged region extension libra
ii libxext6 2:1.0.3-2build1 X11 miscellaneous extension librar
ii libxfixes3 1:4.0.3-2 X11 miscellaneous 'fixes' extensio
ii libxi6 2:1.1.2-1 X11 Input extension library
ii libxinerama1 2:1.0.2-1build1 X11 Xinerama extension library
ii libxrandr2 2:1.2.1-1 X11 RandR extension library
ii libxrender1 1:0.9.2-1 X Rendering Extension client libra
ii libxtst6 2:1.0.2-1ubuntu1 X11 Testing -- Resource extension
ii zlib1g 1:1.2.3.3.dfsg-5ubuntu2 compression library - runtime