use inside web site to find references to files that aren't correctly cased.

check_case.rb

#!/usr/bin/ruby
files = Dir['**/**'].sort

files.each do |file|
  #do a case insensitve search first
  all_matches = `ack -lic "#{file}"`.split("\n")
  puts "found #{all_matches.length} matches for #{file}"
  exact_matches = `ack -lc "#{file}"`.split("\n")

  difference = all_matches - exact_matches

  unless difference.empty?
    puts "#{difference.join("\n")}\n\n-----------------------------------------"
  end
end