I was having some trouble seeing USB devices on my XP virtual machine running in Virtual box on Ubuntu 13.10. I thought perhaps that the standard software centre 4.2 version of VirtualBox might be the problem so I downloaded VirtualBox 4.3 (deb) from the VirtualBox website. I removed my 4.2 version of VirtualBox and installed the downloaded 4.3 version using software centre. The software installation didn't seem to end normally. The icon for the software centre changed to a ? at the end of the installation. I thought it wise to reboot. When I rebooted my unity was gone. I just had a blank wallpaper desktop. I had to reinstall unity. My default terminal was also gone. I had to reinstall that. This is not so much a question as a warning to others to exercise caution when installing VirtualBox 4.3 on Ubuntu 13.10. I have done some searching on the web and I can't find others who have had this specific problem but some people mention the same problem after a "software install" but they don't say which software.
My question is this. Is VirtualBox likely to have broken other stuff that I am not aware of? Is there something specific I should do?
[Edit] I just noticed that my GVim installation also disappeared and I had to reinstall [Edit]