Oracle has just released Oracle VM VirtualBox 5.0 BETA 4.
This fourth beta release improves stability and fixes regressions from BETA 3 release.
See all the details at here with a complete list of enhancements, bug fixes and links to download the software.
Please do _NOT_ use this VirtualBox Beta release on production machines. A VirtualBox Beta release should be considered a bleeding-edge release meant for early evaluation and testing purposes.
The Oracle VirtualBox Team