VirtualBox 4.2.0 released and installed on OpenIndiana 151aprestable6

Oracle has release VirtualBox 4.2.0.

The Solaris-Package is installable on OpenIndiana 151aprestable6 without
problems.
My Virtual Machine based on Windows XP SP3 runs without problems.

The grouping menu entry is disabled in the GUI, have to lookup, if there
is something special to do for this.