[web2py] Multiple form submission - is doc wrong?

[weheh]

I have a multiple form submission with a custom form.

#controller
form1=SQLFORM.factory(db.table,...)
form2=SQLFORM.factory(db.table,...)
...
if form1.accepts(request.vars,formname='form1',onvalidation=xyz):
   ... do something ...

if form2.accepts(request.vars,formname='form2',onvalidation=xyz):
   ... do something else ...


# view
...
form1.custom.begin
...widgets...
<input type="hidden",name="form1",value="default" />
form1.custom.end

form2.custom.begin
... widgets ...
<input type="hidden",name="form2",value="default" />
form2.custom.end

----------

The above seems to work OK. However, the input string is at odds with
what the doc says on p. 195:

  7 <input type="hidden" name="_formname" value="test" />

When I recast my code as

  <input type="hidden" name="_formname",value="form1" />

it doesn't work.

Is the doc wrong?