Strange IRB problem

very strange....
I'm on Vista and updated to Rails 2.2.2 and rubygems 1.3.1 with the
usual problem there.
...but that's well documented...

everything was fine....but then I tried the irb console.
in every shell I have (netbeans, git bash, windows shell)
I got this result:

Don't u need to type ruby in front of ruby scripts on windows!?

Learn rails:

Yeah, I used to have to do that.....especially in the DOS shell.
not sure why that changed.

but in this case it doesn't make any difference.