G70GL + 100.14.03 == no modes :-(
I tried upgrading to 100.14.03 with my FX4500 and when I then tried to start X it failed because it couldn't validate any modes at all - even the auto-detect one.
I then switched back to 97.55 and everything was fine again.
I'll post a bug report later if needed, but perhaps this is a known issue - it isn't hard to reproduce. :-)
By comparision, my laptop with a 6600go works ok with these drivers.