the installation states may conflict when the package name contains version such as virtualbox

The default virtualbox package in archive is "virtualbox" while the latest package name from virtualbox ppa is "virtualbox-4.1/4.3". This will cause the state conflict. For example, I installed virtualbox-4.3, the recommend item shows "not installed" on my system.
带有版本号的包名可能会导致软件安装状态显示的冲突，比如我机器上安装了virtualbox 4.3，但是UKSC中显示未安装。
ps：ubuntu软件中心也是显示未安装。