I've had problems in the past with Plymouth (the pretty graphics you see at boot time) disappearing not long after a fresh installation. I'm reinstalling fresh for this release, and Plymouth has once again absconded right after installation of the proprietary Nvida drivers.
After a quick search of the internet it became apparent that this is not an uncommon problem, nor can anyone agree on a consistent solution. The solution for me was to edit /etc/default/grub and add the following line:
(1920x1080 being my monitor's native resolution). Then run:
What that line does, is set the resolution of the frame buffer, just prior to handing off control to the initial ramdisk (or initrd. This is where Plymouth lives), which seems to make Plymouth happy. This setting is not to be confuse with (for example):
Which would set the resolution of Grub it's self to 1920x1080.