It also seems a change introduced between at rev 1.37 of debug.rb makes 
it difficult for me to attempt to set breakpoints based on file names. 
For example, I get:

     (rdb:1) b PgSQL.rb:updateDisks
     foobar.rb: unitialized constant PgSQL.rb

And if I step until I'm in a method defined in the PgSQL.rb file, then 
set a breakpoint, the "file" seems to be set to a class object.

Something is not correct ...

Any help/guidance will be greatly appreciated.

Thanks,

Jeff.