Hi Lyle,

Still got a problem.  I cleaned up my system with:
-- gem uninstall rails
-- gem uninstall fxruby
-- Control Panel | Add/Remove Pgms: Ruby  [K:\_Utilities\Ruby_1.8.2-15 is 
now empty]
-- Reinstallation of Ruby into K:\_Utilities\Ruby_1.8.2-15\ruby [Note: one 
extra level than before]

Then I ran "gem update" with option "1, fxruby 1.4.2 (ruby)".  Update ran 
for a few minutes and then failed with:
======== Command window output from 'gem update' ============
extconf.rb:30:in `find_installed_fox_version': couldn't find FOX header 
files (RuntimeError)
        from extconf.rb:155
ERROR:  While executing gem ... (RuntimeError)
    ERROR: Failed to build gem native extension.
Gem files will remain installed in
    K:/_Utilities/Ruby_1.8.2-15/ruby/lib/ruby/gems/1.8/gems/fxruby-1.4.2 for 
inspection.
  ruby extconf.rb update\n
Results logged to
   K:/_Utilities/Ruby_1.8.2-15/ruby/lib/ruby/gems/1.8/gems/fxruby-1.4.2/ext/fox14/gem_make.out
===================================================

When I encountered this failure last time,  I tried to install FxRuby using 
FXRuby-1.4.2-ruby182.exe.

Can line 1 in the above output be referring to the *.h files stored in the 
"include" subdirectory of the "gem_make.out" file cited in the last line of 
the above output?  That file is a zip file containing a slew of *.cpp files 
plus a subdirectory of *.h files.

I also found a number of directories which had "fox" in their names or in 
the name of subdirectories or files (all subordinate to 
K:/_Utilities/Ruby_1.8.2-15/ruby/lib/ruby):
========== "FOX related subdirectories ===========
freeride\plugins\rubyide_fox_gui
lib\ruby\1.8\test\unit\ui\fox
lib\ruby\gems\1.8\doc\fxri-0.3.2\rdoc\classes
lib\ruby\gems\1.8\doc\fxri-0.3.2\rdoc\classes\Packet_Item
lib\ruby\gems\1.8\doc\fxri-0.3.2\rdoc\files\lib
lib\ruby\gems\1.8\gems\fxri-0.3.2\lib\FoxDisplayer.rb
lib\ruby\gems\1.8\gems\fxruby-1.2.6-mswin32\examples\icons
lib\ruby\gems\1.8\gems\fxruby-1.2.6-mswin32\ext\fox12
lib\ruby\gems\1.8\gems\fxruby-1.2.6-mswin32\ext\fox12\fox12.so  [A file]
lib\ruby\gems\1.8\gems\fxruby-1.2.6-mswin32\lib\fox12
lib\ruby\gems\1.8\gems\fxruby-1.4.2\examples\icons
lib\ruby\gems\1.8\gems\fxruby-1.4.2\ext\fox14
lib\ruby\gems\1.8\gems\fxruby-1.4.2\lib\fox14
========================================

Maybe the problem was with my choice of option 1.  Here's a list of the 
options:
============ Optional "gems" ================
 1. fxruby 1.4.2 (ruby)
 2. fxruby 1.4.2 (mswin32)
 3. fxruby 1.4.1 (mswin32)
 4. fxruby 1.4.1 (ruby)
 5. fxruby 1.4.0 (ruby)
 6. fxruby 1.2.6 (ruby)
 7. fxruby 1.2.6 (mswin32)
 8. fxruby 1.2.5 (mswin32)
 9. fxruby 1.2.5 (ruby)
 10. fxruby 1.2.4 (ruby)
 11. fxruby 1.2.4 (mswin32)
 12. fxruby 1.2.3 (mswin32)
 13. fxruby 1.2.3 (ruby)
 14. fxruby 1.2.2 (mswin32)
 15. fxruby 1.2.2 (ruby)
 16. fxruby 1.2.1 (mswin32)
 17. fxruby 1.2.1 (ruby)
 18. Cancel installation
=======================================

Maybe I should forget about "gem update" and instead install FxRuby from 
FXRuby-1.4.2-ruby182.exe.  But if so,  where should Fox be installed within 
the Ruby hierarchy?

I hope I didn't overwhelm you with details in this message,  but I'd really 
like to try Ruby on Rails over FxRuby.

Regards,
Richard