54,55c54,55
<           def #{name}; @#{name}; end
<           def #{name}=(value); @#{name} = value; end
---
>           define_method("#{name}") { @#{name} }
>           define_method("#{name}=(value)") { @#{name} = value }

Give that diff file a try, just run:

patch $APP/vendor/rails/actionwebservice/lib/actionwebservice
/path/to/patch/file.diff

That should move it from calling plain-old class def, and use this
better method. Also, just remember to call it with:

Person.send("foo-bar")

I believe...?

M.T.