VirtualBox 4.0.10 リリース

そんなに気になるリリースは無し。太字部分が自分に影響ありそうな部分。
http://www.virtualbox.org/wiki/Changelog

アップデートしていくつかゲストを動かした感じでは大きな問題はなさそう(Win7 64host - guest winxp, win2000, sol10, sol11, rhel6, rhel5, centos5)

・GUI: fixed disappearing settings widgets on KDE hosts (bug #6809)
・Storage: fixed hang under rare circumstances with flat VMDK images
・Storage: a saved VM could not be restored under certain circumstances after the host kernel was updated (bug #8983)
・Storage: refuse to create a medium with an invalid variant (for example Split2G with VDI; bug #7227)
・Snapshots: none of the hard disk attachments must be attached to another VM in normal mode when creating a snapshot
・USB: fixed occasional VM hangs with SMP guests (bug #4580)
・USB: proper device detection on RHEL/OEL/CentOS 5 guests (partial fix for bug #8978)
・ACPI: force the ACPI timer to return monotonic values for improve behavior with SMP Linux guests (bug #8511 and others)
・RDP: fixed screen corruption under rare circumstances (bug #8977)
・rdesktop-vrdp: updated to version 1.7.0
・OVF: under rare circumstances some data at the end of a VMDK file was not written during export
・Mac OS X hosts: Lion fixes (bug #8903)
・Mac OS X hosts: GNOME 3 fix
・Linux hosts: fixed VT-x detection on Linux 3.0 hosts (bug #9071)
・Linux hosts: fixed Python 2.7 bindings in the universal Linux binaries
・Windows hosts: fixed leak of thread and process handles
・Windows Additions: fixed bug when determining the extended version of the Guest Additions (4.0.8 regression; bug #8948)
・Solaris Additions: fixed installation to 64-bit Solaris 10u9 guests (4.0.8 regression)
・Linux Additions: RHEL6.1/OL6.1 compile fix
・Linux Additions: fixed a memory leak during VBoxManage guestcontrol execute (bug #9068)