15 Change log • VMM: fixed guru meditation related to memory management (software virtualization only) • Virtual disks: fix possible data corruption when writing to diff images, incorrect detection of redundant writes • GUI: reworked network settings dialog • GUI: properly show the detailed settings dialog of NAT networks (bug #3702) • GUI: HostKey could not be changed (2.2.0 regression, bug #3689) • GUI: fixed memory textfield size (Windows hosts only bug #3679) • GUI: fixed crash when selecting a shared folder path (Windows hosts only bugs #3694, #3751, #3756) • VBoxManage modifyhd --compact: implemented again for VDI files, and now supports relative paths (bug #2180, #2833) • VBoxManage snapshot discard: made it work again (2.1.0 regression bug #3714) • NAT: on some Windows hosts, the guest didn’t receive a DHCP lease (bug #3655) • NAT: fixed release assertion during poll() (bug #3667) • Networking: fixed a deadlock caused by the PCnet network device emulation (2.2.0 regres- sion, bug #3676) • Clipboard: fixed random crashes (X11 hosts only, bug #3723) • Shared Folders: fixed incorrect permissions for Solaris guests • Shared Folders: fixed wrong file sizes with Solaris guests • CBindings: fixed possible memory leak while releasing the IVirtualBox and ISession Objects • Solaris hosts: fixed host-only network interface incompatibility with nwam/dhcpagent (bug #3754) • Windows installer: fixed several install and uninstall issues (bugs #3659, #3686, #1730, #3711, #3373, #3382, #3701, #3685, #3710) • Mac OS X hosts: preliminary support for Snow Leopard 15.25 Version 2.2.0 (2009-04-08) This version is a major update. The following major new features were added: • OVF (Open Virtualization Format) appliance import and export (see chapter 1.12, Import- ing and exporting virtual machines, page 26) • Host-only networking mode (see chapter 6.6, Host-only networking, page 88) • Hypervisor optimizations with significant performance gains for high context switching rates • Raised the memory limit for VMs on 64-bit hosts to 16GB • VT-x/AMD-V are enabled by default for newly created virtual machines • USB (OHCI & EHCI) is enabled by default for newly created virtual machines (Qt GUI only) 219