Combinations where problem confirmed:- Host: Debian squeeze running vbox 3.1.6, 3.2.6, 3.2.8 , Guest: Ubuntu 10.4 Host: Mac OS X 10.6.4 vbox 3.2.8, Guest: Ubuntu 10.4 Host: Mac OS X 10.6.4 vbox 3.2.8, Guest: Windows XP Pro Host: Windows XP Pro vbox 3.2.8, Guest: Ubuntu 10.4 CD in 'try/demo' mode (here I used all the default options when creating the VM) Host: Windows XP Pro vbox 3.2.8, Guest: Windows XP Pro If left long enough the VM fails with this log 19:23:12.241 PGM: Failed to procure handy pages; rc=VERR_NO_MEMORY rcAlloc=VERR_NO_MEMORY rcSeed=VINF_SUCCESS cHandyPages=0x10 19:23:12.241 cAllPages=0x484cf cPrivatePages=0x2cf43 cSharedPages=0x0 cZeroPages=0x1b58c 19:23:12.242 PGM: Failed to procure handy pages; rc=VERR_NO_MEMORY rcAlloc=VERR_NO_MEMORY rcSeed=VINF_SUCCESS cHandyPages=0x10 19:23:12.242 cAllPages=0x484cf cPrivatePages=0x2cf43 cSharedPages=0x0 cZeroPages=0x1b58c 19:23:12.243 VM: Raising runtime error 'HostMemoryLow' (fFlags=0x2) 19:23:12.243 Changing the VM state from 'RUNNING' to 'SUSPENDING'. 19:23:12.292 Changing the VM state from 'SUSPENDING' to 'SUSPENDED'. 19:23:12.293 Console: VM runtime error: fatal=false, errorID=HostMemoryLow message="Unable to allocate and lock memory. The virtual machine will be paused. Please close applications to free up memory or close the VM"