[racket] Is this a bug? [Documentation: Formlets]

Hello, I was skimming through formlets documentation today
<http://docs.racket-lang.org/web-server/formlets.html>
and I noticed that some examples won't run on my DrRacket (5.1.1). For
example, this one:

> (formlet* `(div ,@(for/list ([i (in-range 1 10)])
>                     `(p ,(number->string i)
>                         ,(text-input . =>* . name))))
>           name)

It gave me the following error: http://pastebay.com/131051

However, if I change `text-input' to `input-string' it works fine and
generates expected xexpr.

Is this a bug or I am not understanding something?

Thanks in advance and pardon my English.