alice-teacher error with a list

[Donna Wilkins]

I am using the book Learning to Program with Alice and the Duke tutorials to teach my 9th and 10th graders. Yesterday we worked on the "bunny eats broccoli" tutorial from the Duke site ( http://www.cs.duke.edu/csed/alice09/tutorials.php  - roll about a third of the way down the page)  and ran into a problem when we created the list. I worked it twice and got the same error at run-time-- "target cannot be null" and the "my first world method" was switched to bunny.eat. For the life of me, I can't figure it out. 

I just ran the "bunnyEatBroccoliFinishedWithList" from the tutorial page itself and the error happened there as well.

Can anyone help, please????? 

One more question--- is it possible to alter the size of the speech bubbles so that they don't cover another object?

Thank you,

Donna Wilkins
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