> I don't see it anything about the gd library in either the admin (click) menu or the php info screen. Am I missing something? Why did it work before?
> BTW, I am not running my own server (would that I were).
You would need to have GD module showing in the phpinfo screen. Without it, many parts of Tiki wont work. Check the Install Requirements from InstallTiki. You might also want to checkout TikiFriendlyHosts if there are hosting problems.