VirtualBox machine shutdown lasts increasingly long

[CeDeROM]

Hello :-)

I have noted that with VBox 4.2.6 and FreeBSD 9.1-RELEASE AMD64
closing VirtualBox takes very long time, this time sometimes gets
incresingly long, very often I am forced to kill the process. With
previous versions when I wanted to shutdown the machine it did the
shutdown momentairly. What is wrong with my VBox? :-)

Best regards :-)
Tomek

-- 
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info