Unusual Characters in Interactive Console

[Colin Campbell-McPherson]

Hi there,

I'm trying to use irb, the interactive ruby console within emacs. When  
I execute a command the output is not rendering correctly.
I'm on OS X Leopard and have tried running emacs in Terminal, iTerm  
and Aquamacs, all with the same results. I haven't found much on the  
net aside from suggestions to change font, which hasn't worked for me.

Example:

------------------------------
irb(main):004:0> 1+1
1+1
^[[0;36m2^[[0;0m
irb(main):005:0> nil
nil
^[[0;32mnil^[[0;0m
------------------------------

should be:

------------------------------
>> 1+1
=> 2
>> nil
=> nil
------------------------------

Any help would be much appreciated.