Just updated Ruby from CVS, compiled it, and started up irb.

ted@acacia:bin > irb
/usr/local/lib/ruby/1.7/irb.rb:54:in `start': private method `initialize' called for IRB:Module (NoMethodError)
        from /usr/local/bin/irb:13

'ruby' appears to work just fine, though.

Any pointers appreciated!