I am also seeing this.

Freshly installed Fedora 15 using B.F.O. installer for F15 i386. Default 'Graphical Desktop' install. The only change was using btrfs instead of ext for /

After the install and first reboot (at the first firstboot screen) I switched to ascii console (ctrl-alt-f2) and added some packages before rebooting. At the date and time screen firstboot does not offer ntp (greyed out), and the next button does nothing. After reading this bz, I again switched to ascii, installed ntp and ntpdate and rebooted. Now firstboot works fine.

Should ntp be in the default desktop install?

Anyway, firstboot should have worked without ntp...

I just did a clean install on a laptop with updates enabled and see the same issue.  Can't select time sync and can't go to next.  Was there some change in the updates that messed this up recently?

*** Bug 736181 has been marked as a duplicate of this bug. ***

I tried this with Fedora 16. After normal Graphical Desktop installation, I got firstboot ntp settings working properly. The ntp package was not installed, but the chrony package was installed instead.

I tried removing the chrony package then, so there was no ntp or chrony installed, and run firstboot again. Now the ntp sync option was greyed out, but after pressing forward I got the hardware profile screen and firstboot worked normally.

So what I think happened. In F15 the default was ntp, in F16 it changed to chrony. But if you use F15 with updates, somehow you will end up with none, so the ntp sync is greyed out because of that. But I couldn't reproduce not being able to go to next screen in firstboot. It worked for me.

Can you test this with F16 Alpha?

Either way, if this is still a valid bug, it needs to be reassigned, either to comps, so ntp or chrony is installed, or to system-config-date, where the time and date module comes from.

I was installing Fedora 16 Alpha a few days ago and besides problem with Smolt (empty hardware profile tab - problem marked as a known bug) there was no problem like mentioned in Fedora 15.

Have there be the updates of mentioned packages since 2011-09-06?

These Bugreports may address the same problem:
Bug 734906
Bug 736181
Bug 737235
Bug 747869

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