I just updated to 18480 and after installation of the Parallels tools and reboot of the VM, the mouse arrow keeps freezing and/or disappearing on the screen in Windows. If I push control-option the mouse cursor/arrow reappears and works again for a while. I've not seen this on previous versions of Parallels 8 with Windows 8. I have a MacbookPro Retina, mid-2012, with Mac OS 10.8.3 and no problems on the Mac side, so far as I know. Anyone else experiencing this?