VBoxSVC assert failure: *** glibc detected *** /usr/lib/virtualbox/VBoxSVC: corrupted double-linked list: 0x0000000001e130c0 ***

vbox's window disappeared I pressed control-F to take it out of fullscreen

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: virtualbox 4.1.2-dfsg-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-16.29-generic 3.0.20
Uname: Linux 3.0.0-16-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
AssertionMessage: *** glibc detected *** /usr/lib/virtualbox/VBoxSVC: corrupted double-linked list: 0x0000000001e130c0 ***
Date: Fri Mar 16 11:10:05 2012
ExecutablePath: /usr/lib/virtualbox/VBoxSVC
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcCmdline: /usr/lib/virtualbox/VBoxSVC --auto-shutdown
ProcEnviron:
 LANGUAGE=en_GB:en
 LC_TIME=en_GB.utf8
 PATH=(custom, no user)
 LANG=en_GB.utf8
 SHELL=/bin/bash
Signal: 6
SourcePackage: virtualbox
StacktraceTop:
 __libc_message (do_abort=2, fmt=0x7fb832287e58 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
 malloc_printerr (action=3, str=0x7fb832284e52 "corrupted double-linked list", ptr=<optimized out>) at malloc.c:6283
 _int_free (av=0x7fb8324c31c0, p=0x1e12ff0) at malloc.c:4973
 __GI___libc_free (mem=<optimized out>) at malloc.c:3738
 ?? ()
Title: VBoxSVC assert failure: *** glibc detected *** /usr/lib/virtualbox/VBoxSVC: corrupted double-linked list: 0x0000000001e130c0 ***
UpgradeStatus: Upgraded to oneiric on 2011-10-14 (153 days ago)
UserGroups: adm admin audio cdrom dialout dip fuse lpadmin netdev plugdev sambashare vboxusers video wireshark