Drupal 7.x

I am trying to get a form element to have auto complete

$form['item'] = array(
'#type' => 'textfield',
'#title' => t('Select the user'),
'#autocomplete_path' => 'user/autocomplete',
);

I am trying to render it through drupal_render($form); and i keep getting this error

Notice: Undefined index: id in theme_textfield() (line 3670 of /var/www/drupal-7.2/includes/form.inc).

Hi all:

I love drupal and am 1/2 way through developing a new site.

1 thing that I've found is that some of the modules are causing w3c validation errors. I've searched Drupal and this seems to be a known issue (for example, 1st errors are caused by validation meta tags from google etc) but I would love it if someone could provide me some hints on how to resolve the below issues? I'm not sure how easy / hard it is but would love some advice:

the errors are the following (full code/report below):
1. Line 23, Column 12: there is no attribute "name"
2. Line 23, Column 28: there is no attribute "content"
3. Line 23, Column 48: element "META" undefined
4. Line 287, Column 103: duplicate specification of attribute "name" …1" class="" multiple="multiple" name="tid_1[]" /> 5. Line 513, Column 9: end tag for "div" omitted, but OMITTAG NO was specified

(web url http://www.fairflats.com)

Thanks in advance!

---------

Validation Output: 12 Errors

1 Line 23, Column 12: there is no attribute "name"

✉

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