Main: fixed possible hang during guest reboot (bug #3792).Main: restrict guest RAM size to 1.5 GB (32 bits Windows hosts only).Main: fixed a rare parsing problem with port numbers of USB device filters in machine settings XML.OVF: fixed XML comment handling that could lead to parser errors.Python shell: corrected detection of home directory in remote case.Python shell: various improvements and bugfixes.Python API: several threading and platform issues fixed.Python WS: fixed issue with certain enumerations constants having wrong values in Python webservices bindings.Mac OS X hosts: prevent password dialogs in 32 bits Snow Leopard.Linux/Solaris hosts: correctly detect keyboards with fewer keys than usual (bug #4799).Linux hosts: don't crash on Linux PAE kernels Solaris hosts installer: added missing dependency for UTF-8 package (bug #4899).Solaris hosts: fixed a potential host system deadlock when CPUs were onlined or offlined.Solaris hosts: fixed a rare host system deadlock when using bridged networking.Solaris hosts: worked around an issue that caused the host to hang (bug #4486).

VMM: NetBSD 5.0.1 CD hangs during boot (VT-x only bug #3947).

VMM: cpuid change to correct reported virtual CPU id in Linux.

VMM: small Solaris/OpenSolaris performance improvements (VT-x only).VMM: fixed decreasing rdtsc values (AMD-V & VT-x only bug #2869).VMM: fixed hangs with 64 bits Solaris & OpenSolaris guests (bug #2258).VMM: fixed a Guru meditation when booting certain Arch Linux guests (software virtualization only bug #2149).

VMM: fixed a Guru meditation under certain circumstances when enabling a disabled device (bug #4510).VMM: fixed IO-APIC overhead for 32 bits Windows NT, 2000, XP and 2003 guests (AMD-V only bug #4392).

Virtualbox 32 bit windows 10