IRB won't work

I am a newb. Running OS X leopard. Installed ruby, rails, mysql
through macports. Everything works fine except today I tried to run
the irb console. I get the following:

computer: mark$ ruby script/console
Loading development environment (Rails 2.1.0)
dyld: NSLinkModule() error
dyld: Symbol not found: _rl_completion_matches
  Referenced from: /usr/local/lib/ruby/1.8/powerpc-darwin9.4.0/
readline.bundle
  Expected in: flat namespace

Trace/BPT trap

computer: mark$ ruby -v
ruby 1.8.6 (2007-09-24 patchlevel 111) [powerpc-darwin9.4.0]

Any ideas?

I am a newb. Running OS X leopard.

OK.

Installed ruby, rails, mysql
through macports.

Huh? If you're running Leopard, you should have ruby and rails already! You may have a conflict:

rab:Users/rab $ which ruby
/usr/bin/ruby
rab:Users/rab $ ruby -v
ruby 1.8.6 (2008-03-03 patchlevel 114) [universal-darwin9.0]

rab:Users/rab $ which rails
/usr/bin/rails
rab:Users/rab $ rails -v
Rails 2.1.0

Everything works fine except today I tried to run
the irb console. I get the following:

computer: mark$ ruby script/console
Loading development environment (Rails 2.1.0)
dyld: NSLinkModule() error
dyld: Symbol not found: _rl_completion_matches
Referenced from: /usr/local/lib/ruby/1.8/powerpc-darwin9.4.0/
readline.bundle
Expected in: flat namespace

Trace/BPT trap

computer: mark$ ruby -v
ruby 1.8.6 (2007-09-24 patchlevel 111) [powerpc-darwin9.4.0]

Any ideas?

I hope that gives you a starting point.

-Rob

Rob Biedenharn http://agileconsultingllc.com
Rob@AgileConsultingLLC.com

All my responses are the same as yours. Just no irb.
Can irb be reinstalled by itself or maybe I should just reinstall ruby
again?