Bob, basically, you started at the wrong end. You should not have messed with the individual configuration parameters for each program subsystem, instead if you should have told X-Windows that the screen had a different DPI (number of dots per inch) In this way, you get X-Windows to use more dots for each inch, since you are lying (about the DPI), you actually increase the size X-Windows display everything.
I have had the same problem with a new 19" monitor on 1600x1200. When I set the higher DPI, everything works fine in konqueror, all the KDE stuff, all the gnome stuff, but in mozilla, everything is so damned tiny. It just refuses to use the system DPI setting. I've tried everything, and I gave up. I just press CTRL +, and weep. :-)