I have upgraded to Fedora 11. All seemed fine, system booted up and everything worked as expected. But when I rebooted, the system failed to start. Removing the rhgb and quiet options from the kernel command, I see all the messages until the system hangs. Hit escape and I see this "Could not start boot splash: no such file or directory". After searching round, I found a suggestion to add a vga=... option to the kernel command. I didn't know the right value, but the system helpfully showed me all values and I selected 37d (1920x1200x32). With that option, the system booted up again just fine. But again, when I closed down and rebooted, the system failed to start in exactly the same way as before. I've tried any number of different options, but the system steadfastly refuses to boot.
Any help would be appreciated.
Incidentally, the system boots fine from a Live CD (although I've only tried that once as yet, since it takes about 1/2 an hour)