I noticed the (quite useful) warning in the download page
Since I am experimenting with a Win10 host, I went to the test build page to download the latest build and I found that the "windows" link points to a file named VirtualBox-5.0.1-102010-Win.exe.There are known problems with VirtualBox 5.0.2 on Windows 10 hosts and with Windows 10 guests. Some of the problems are fixed in the most recent test build which can be found here.
Does that mean that presently the latest official release (VirtualBox-5.0.2-102096-Win.exe) actually IS the latest available build?