Huge fonts: X / KDE may be ignoring DisplaySize

["Edward C. Jones" <edcjones@comcast.net>]

I use up-to-date Debian unstable, amd64 port, on my pc. I use KDE. The
monitor is an Acer AL2016W. The graphics board is an nVidia GeForce FX 5500.
I usually do not reboot after running synaptic to update my system.

When I rebooted on 2/6, I found that much of the text in KDE was in huge
fonts. X or KDE seemed to be ignoring the DisplaySize command in xorg.conf.
I found two threads in in the debian-x mailing list for Jan 08 that may be
relevant. The first is "Bug#461501: xserver-xorg-core: dpi set to 96 inspite
of DisplaySize option". The second is "Bug#461457: xorg: Doesn't honour
DisplaySize".

What should I do to fix my problem?

Here are parts of Xorg.0.log and xorg.conf:

/var/log/Xorg.0.log:

(**) NV(0): Display dimensions: (430, 270) mm
(**) NV(0): DPI set to (148, 216)

/etc/X11/xorg.conf:

Section "Monitor"
       Identifier      "AL2016W"
       Option          "DPMS"
       DisplaySize     430 270
EndSection

Section "Screen"
       Identifier      "Default Screen"
       Device          "nVidia Corporation NV34 [GeForce FX 5500]"
       Monitor         "AL2016W"
       DefaultDepth    24
...
       SubSection "Display"
               Depth           24
               Modes           "1680x1050" "1280x1024" "1152x864" 
"1024x768" "800x600" "720x400" "640x480"
               Virtual         2520 2304