At my wit's end (debugging a Rails 3.0/Ruby 1.9.2 app)

["baldmark" < >]

Based on what Nicholas did I think I have generalised it for multiple Ruby / 
Rails projects by replacing the line
bt = debug_load(Debugger::PROG_SCRIPT, options.stop, options.load_mode) 
around line 125 of ruby-debug-ide.rb with

if Debugger::PROG_SCRIPT == 'script/rails'
  ps = `pwd`.chomp+'/script/rails'
else
  ps = Debugger::PROG_SCRIPT
end
bt = debug_load(ps, options.stop, options.load_mode)

I don't have the confidence to attempt a 'proper' solution but (in my limited 
experience - I am a newbie) I can't see what this doesn't work for.

Mark