SUN发布VirtualBox 3.1.0 Beta 1

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3.1.0对VirtualBox来说是一个milestone。SUN发布了Beta Release。 Beta Release是开发中的产品，主要用于评估和测试，不能继承到商业应用中。
VirtualBox 3.1.0 Beta 1最新的特性：

• Teleportation (aka live migration); migrate a live VM session from one machine to another
  
• VM states can now be restored from arbitrary snapshots instead of only the last one, and new snapshots can be taken from other snapshots as well (aka branched snapshots)
  
• 2D video acceleration for Windows guests; use the host video hardware for overlay stretching and colour conversion
  
• The network attachment type can be changed while a VM is running
  
• Experimental USB support for OpenSolaris hosts making use of the latest USB enhancements in Solaris Nevada 124 and higher.
  
• Significant performance improvements for PAE and AMD64 guests (VT-x and AMD-V only; normal (non-nested) paging)
  
• Experimental support for EFI (Extended Firmware Interface)
  
• VirtIO network device support
  

VirtualBox 3.1.0 Beta 1存在的问题：

• Snapshots of VMs with multiple attached disk images is broken. Please do not use snapshots with such VMs
  
• Snapshots of VMs with empty DVD attachments is broken
  
• Snapshots with immutable images not expected to work correctly