There is a maintenance release by Oracle for the virtualization platform VM Virtualbox. This is version 4.2.12 and can be installed on the 4.2 version from last year. This will fix several problems. It will give support for multimonitor. It will do a compile fix for the Debian Linux kernel. It will fix empty seamless screens. It will also set the VM settings. These changes are more detailed in the change log.
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