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

- GUI: properly limit the number of VCPUs to the number of physical cores on Mac OS X (bug #15018)
- Audio: fixed a bug which prevented loading a saved state of a saved guests with HDA emulation (5.0.12 regression; bug #14981)
- Audio: don't crash if the backend is unable to initialize (bug #14960)
- Audio: fixed audio capture on Mac OS X (bug #14386)
- Storage: fixed a possible crash when attaching the same ISO image multiple times to the same VM (bug #14951)
- BIOS: properly report if two floppy drives are attached
- USB: fixed a problem with filters which would not capture the device under certain circumstances (5.0.10 regression; bug #15042)
- ExtPack: black-list Extension Packs older than 4.3.30 due to incompatible changes not being properly handled in the past
- Windows hosts: fixed a regression which caused robocopy to fail (bug #14958)
- Linux hosts: properly create the /sbin/rcvboxdrv symbolic link (5.0.12 regression; bug #14989)
- Mac OS X hosts: several fixes for USB on El Capitan (bug #14677)
- Linux Additions: fixes for Linux 4.5 (bug #15032)