VirtualBox 4.3.20 (released 2014-11-21)

This is a maintenance release. The following items were fixed and/or added:

• VMM: fixed reboot hang of 32-bit Windows SMP guests (bug #13319, #13462)
  
• VMM: proper Math Fault handling with certain legacy guests (bug #9042, AMD hosts)
  
• VMM: fixed a Guru Meditation VINF_EM_TRIPLE_FAULT on older CPUs that don´t support MSR-bitmaps (VT-x only; bugs #13034, #13125, #13311, #13425, #13426, #13463, #13585)
  
• GUI: fix 3D overlay window re-parenting issue when VM goes to full screen mode on X11 hosts.
  
• GUI: fix occasional loss of focus in full-screen mode on X11 host systems (4.3.16 regression)
  
• GUI: Mac OS X: wizards should have Cancel button (bug #12541)
  
• GUI: added a global option to prevent automatic raising of the new window by mouse move with multi-screen guests (bug #8878)
  
• API: accept remote display port 0 as the default RDP port (bug #8534)
  
• VBoxManage: fixed crash when executing showvminfo command under certain circumstances (bug #13190)
  
• ACPI: fixed occasional Guru Meditations in ACPI timer code (4.3.18 regression; bug #13521)
  
• EFI: improved performance of IDE disk access
  
• EFI: fixed a bug in the EFI video driver which prevented Windows to boot in UEFI mode (bug #12022)
  
• EFI: properly announce the amount of RAM for big VMs (bugs #11103 and #13211)
  
• Storage: fixed a crash under certain circumstances when a medium was ejected from a drive attached to the SATA controller without inserting a new medium before pausing or closing the VM (4.3.16 regression)
  
• Storage: fixed an interrupt acknowledge issue causing hanging guests or slower I/O (4.3.18 regression)
  
• Storage: fixed broken resume after the VM was suspended due to a full disk if host I/O caching is used
  
• Storage: fixed a Guru Meditation under certain conditions when using the DevLsiLogic controller with VMs running in raw mode (4.3 regression; bugs #12254, #12655, #12709, #12774, #12886)
  
• Guest Control: fixed a bug which might lead to a crash during recursive copy
  
• SDK: Java COM bindings fixes
  
• iPXE: enable the HTTP download protocol (bug #13628)
  
• Runtime: do not use a fixed stack size creating temporary threads during initialization (bug #13038)
  
• Windows hosts: fixed more startup problems on certain Windows hosts due to conflicts with anti-virus software; better error reporting (4.3.14 regression; bug #13187)
  
• Windows hosts: fixed DirectSound host audio failure under certain conditions (bug #13418)
  
• Windows hosts: fixed additional cases of 4.3.14 regression whereby AltGr stopped working for some people (bug #13216)
  
• Windows Additions: preserve guest monitor layout when resizing Windows 7 or newer guests
  
• Linux Additions: Linux 3.18 compile fixes (bug #13515)

VirtualBox 4.3.18 (released 2014-10-10)

This is a maintenance release. The following items were fixed and/or added:

• VMM: fixed a potential misbehavior after restoring the A20 state from a saved state
  
• GUI: fixed full-screen mode mini-toolbar related regressions for different platforms and window managers (bug #13369)
  
• GUI: X11: fixed full-screen mode Unity panels quirk caused by mini-toolbar code changes in last release (bug #13365)
  
• GUI: X11: added possibility to use legacy full-screen mode as the new one can cause multi-screen issues under Unity, see the manual for more information (bug #13365)
  
• GUI: Mac OS X: fixed full-screen mode artifact causing black screen when 3D acceleration was enabled on 10.10 Yosemite hosts (bug #13448)
  
• GUI: Mac OS X: fixed regression in user-space swiping from/to VBox in full-screen mode
  
• GUI: Mac OS X: fixed issue with switching to VBox in full-screen mode through Alt+Tab and Mission Control
  
• Storage: fixed data corruption when resizing huge VHD images under certain circumstances (bug #11960)
  
• Storage: fixed a rare hang during startup when the BIOS enumerates the storage devices attached to the SATA controller
  
• Storage: follow the spec with AHCI interrupt acknowledge (bug #13474)
  
• Storage: fixed broken iSCSI authentication (4.3.14 regression, bugs #13386, #13435)
  
• NAT Network: properly parse port forwarding rules to allow UDP rules
  
• USB: fixed a crash on Linux hosts with older Linux kernels (bug #13400) and several other fixes
  
• ACPI: fixed ACPI timer anomalies (bug #12076)
  
• Guest Control: fixed a memory leak (bug #13434)
  
• Main: when removing a VM, do also remove the VBoxStartup.log file which might exist on Windows hosts (bug #13478)
  
• Windows hosts: fixed more startup problems on certain Windows hosts due to conflicts with anti-virus software; better error reporting (4.3.14 regression; bug #13187)
  
• Windows hosts: propagate the process startup information to the child process (4.3.14 regression; bug #13243)
  
• Mac OS X hosts: don´t force using the discrete GPU (bug #11111)
  
• Windows Additions: some Windows 10 tweaks
  
• X11 guests: fix a bug handling video driver display properties which prevented GNOME Shell on Fedora 21 from starting
  
• Linux hosts / guests: fixed a few remaining warnings in the kernel log if memory allocation fails (bug #11171)