Upgrading to Fedora 10 was a smooth job probably because of RPM Fusion.
To get the most of the new graphical bootup screen, add the vga-parameter in your boot config (
kernel /vmlinuz-2.6.27.[---8<---] rhgb quiet vga=0x31
The 0x31B is a Kernel VESA graphics mode in 1280×1024 resolution and in 16M colours. If it is not available in your case, check a VGA modes list. And don’t worry, you can change or remove the parameter from GRUB bootup screen.