Label and Description are not shown

Can confirm this bug. Both the Label and Description of a Table element component are not shown, neither in View, nor in Edit mode.

Fixed in the latest dev version

Thanks for fixing it so quickly. Are you sure the change

-  return theme('table', $header, $rows);
+  return theme('form_element', $element, theme('table', $header, $rows));

is correct? I mean theme() inside theme().

Yes,
Have a look at theme_form_element. It is basically a wrapper function to display the title and description. It takes two parameters: $element and $value

$element: An associative array containing the properties of the element. Properties used: title, description, id, required

$value: The form element's data.

In our case The form element's data is the table with its components

Excellent, thank you. Label and Description are now shown on the web page. A small problem is still there, however: the Label is missing in the email being sent on a submission, as part of %email_values.

I'm sorry I overlooked it, this was indeed an issue when the mail was sent in plain text, fixed in latest dev

Thank you - can confirm that this now works fine in v6.x-1.4+7-dev (2012-May-17).