Fedora 9 X dual monitor problem

I recently "upgraded" my laptop from Fedora 8 to Fedora 9. As always, I 
backed up the old system and started from reformatted drives. I never 
upgrade my OS in place. This is on my Dell Latitude D820 with a 15.4 
inch 1680x1050 screen, using the proprietary Nvidia driver. I've had 
quite a few problems with F9. I don't know how much of my pain is coming 
from KDE4 being fresh out of the oven, and how much of it is F9 itself.

When I was running F8, I was able to sucessfully hook up the external 
video port to my Sony Bravia TV's PC port. It does 1380x768. This is 
essential functionality for me, so I can watch MythTV on the TV while 
using my internal screen for email/web/etc. I used separate Xs, not 
TwinView or Xinerama (I experimented with those, but windows would 
launch on the TV when it wasn't hooked up, so I couldn't get to them). 
And all was right in the world

After I loaded F9, I'm not able to get the TV to display anything. I see 
a crosshatch pattern over the screen, and if I move the mouse to that 
screen, I see the cursor, but I can't right click or left click. I even 
tried the exact xorg.conf from F8, and that didn't work either. Instead 
of the crosshatch pattern, the TV was just black.

I have a complete writeup, with links to the config and log files at:
http://www.thekramers.net/tmp/xproblem/

Someone suggested that X wasn't starting on that screen (:1), and to try 
to start it separately, but that didn't work.
[david <at> lexa ~]$ export DISPLAY=:1
[david <at> lexa ~]$ echo $DISPLAY
:1
[david <at> lexa ~]$ kwin