Linux VirtualBox machines suffer bugs and compatibility problems on Windows 8 Host

[sinansas]

I installed 64 bit Fedora, Ubuntu and Linux Mint as VirtualBox machines on Windows 8 (Pro x64) host. And there are a few problems I noticed, namely; they all crashed a few times, and the mouse pointer is flashing when mouse integration is enabled, and the virtual machine screen does not auto-resize even though the guest additions are installed, and the machines are awfully slow even though I allocate a good deal of hardware resources, and the virtual machine window doesn't disappear when the system is halted. In brief, they all are not usable.

Please note, I was using various Linux distros seamlessly as VirtualBox machines on Windows 7.