Since upgrading to current VirtualBox 4.1.10
my Wndows(R) XP Pro 32Bit guest crashes on system shutdown?

Running current VirtualBox 4.1.10
on Linux Mint 12 KDE 64Bit host
with Microsoft(R) Windows(R) XP Pro 32Bit guest.
Crash always occurs when shutting down the guest?
Guest Additions for Windows(R) guests are installed.
Any ideas why this is happening?
Thanks!
Jesse