awn-applet assert failure: *** glibc detected *** awn-applet: double free or corruption (!prev): 0x0a0c5ed8 ***

Binary package hint: avant-window-navigator

"system monitor" applet crashed after i've changed the size of the bar from 42 to 32

ProblemType: Crash
Architecture: i386
AssertionMessage: *** glibc detected *** awn-applet: double free or corruption (!prev): 0x0a0c5ed8 ***
Date: Mon Mar 8 17:02:54 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/awn-applet
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100113)
NonfreeKernelModules: nvidia
Package: avant-window-navigator 0.3.9.1~bzr603-0ubuntu1
ProcCmdline: awn-applet -p /usr/share/avant-window-navigator/applets/sysmon.desktop -u 1268077630 -w 27263030 -i 1
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-16.24-generic
Signal: 6
SourcePackage: avant-window-navigator
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/tls/i686/cmov/libc.so.6
 abort () from /lib/tls/i686/cmov/libc.so.6
 ?? () from /lib/tls/i686/cmov/libc.so.6
 ?? () from /lib/tls/i686/cmov/libc.so.6
Title: awn-applet assert failure: *** glibc detected *** awn-applet: double free or corruption (!prev): 0x0a0c5ed8 ***
Uname: Linux 2.6.32-16-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (polkit-gnome-authentication-agent-1:1493): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (awn-applet:1564): Gdk-CRITICAL **: gdk_cairo_create: assertion `GDK_IS_DRAWABLE (drawable)' failed
 (awn-applet:1561): GLib-CRITICAL **: g_utf8_strdown: assertion `str != NULL' failed
 (gnome-terminal:1904): Gtk-CRITICAL **: gtk_accel_map_unlock_path: assertion `entry != NULL && entry->lock_count > 0' failed
 (awn-applet:2094): Gdk-CRITICAL **: gdk_cairo_create: assertion `GDK_IS_DRAWABLE (drawable)' failed