User-Agent:       Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6

I'd like to try the new 11. 3 M1 version under Virtualbox, on my 11.2 machine.  It's an x86_64 machine, but VBox is 32 bit due to some BIOS limits.  I've done this with most previous milestones and RCs.  This time, it fails very quickly on attempting to install from the DVD iso.  After selecting "installation", it attempts to boot.  It successfully sets up udev, but then fails on attempting to install basic drivers.  After a few seconds, the flashing cursor stops flashing, and the machine is hung.  I've tried a few settings (safe settings, ACPI off, etc) and various VBox setting, but the behaviour is always the same.

Reproducible: Always

Steps to Reproduce:
1.Try to install 11.2 M1 32 bit DVD iso on Virtualbox 3.1.2 r51627
2.Boot with standard boot options
3.Hit "esc" to view the boot process.
4. Setting up udev succeeds
5. Loading basic drivers hangs.
Actual Results:  
The virtual machine hangs and has to be powered off.

Expected Results:  
A normal boot into the installer.

The version of VBox in use successfully runs many other OSs, including Ubuntu, SuSE 11.2 and windows 7.