I'm using VirtualBox 4.12 with the corresponding extensionpack installed with Mac OS-X-10.5 and different Windows-versions from Win2000 to Win7.
Non of the USB-devices that I were able to connect to the VM in the past, now can be connected, no WD-USB-HD, no Cardreader, no USB-Disk.
I guess this is an error of the current version - but maybe anyone has a solution for this. Otherwise I would have to downgrade or use another virtualisationsoftware.
Edit(October,05.):
The problem has been solved with virtualbox vs. 4.1.4.