Today I had time to boot up my Virtual Box image with Windows 2012 Server for some SharePoint 2012 action. And after only a few minutes I was very frustrated with how often Internet Explorer 10 crashed just to reopen the pages again. The solution to the problem was to disable 3D acceleration in the properties for the virtual machine, apparently Virtual Box (even in the latest version 4.1.22) and Windows 2012 Server (probably also Windows 8) have issues working correctly with 3D acceleration.
I Hope this will be fixed soon.