OK, so basically I frequently use forms with no headers, or field header text before the form, using standard page headers and text to provide the info.  If I insert a usercontrol form with the headers etc, I get this:

<div umb_macroalias="umbracoContour.RazorRenderForm" umb_formguid="1e936af2-dfaf-4ee6-9712-e61a71e1####" ismacro="true" onresizestart="return false;" umbversionid="0d286d61-0b17-432c-aee6-e4da1e55####" umbpageid="23##" title="This is rendered content from macro" class="umbMacroHolder"><!-- startUmbMacro -->

<div id="contour" class="requesta########">

<div class="contourPage">

<h4 class="contourPageName">Request a ########</h4>

Some text is here....

<div class="contourField fullname textfield mandatory">Full name

<div></div>

</div>

<div class="contourField jobtitle textfield mandatory alternating">Job title

<div></div>

</div>

<div class="contourField organisation textfield mandatory">Organisation

<div></div>

</div>

<div class="contourField telephone textfield mandatory alternating">Telephone

<div></div>

</div>

<div class="contourField email textfield">Email

<div></div>

</div>

<div class="contourField enquirydetails textarea alternating">Enquiry details

<div></div>

</div>

<div style="display: none;"></div>

</div>

<div class="contourNavigation"></div>

</div>

<!-- endUmbMacro --></div>

 

This works. But if I insert the form without headers like this:

<div umb_macroalias="umbracoContour.RenderForm" umb_formguid="1e936af2-dfaf-4ee6-9712-e61a71e1####" ismacro="true" onresizestart="return false;" umbversionid="c0ecf739-b309-4db7-a064-b113d8d2####" umbpageid="23##" title="This is rendered content from macro" class="umbMacroHolder"><!-- startUmbMacro -->

<div id="contour" class="requesta######## ">

<div class="contourField text fullname textfield mandatory"><!-- Our label -->Full name

<div><!-- The data entry control --></div>

<!-- Our Tooltip --> <!-- Validation --> </div>

<div class="contourField text jobtitle textfield mandatory alternating"><!-- Our label -->Job title

<div><!-- The data entry control --></div>

<!-- Our Tooltip --> <!-- Validation --> </div>

<div class="contourField text organisation textfield mandatory"><!-- Our label -->Organisation

<div><!-- The data entry control --></div>

<!-- Our Tooltip --> <!-- Validation --> </div>

<div class="contourField text telephone textfield mandatory hasvalidator alternating"><!-- Our label -->Telephone

<div><!-- The data entry control --></div>

<!-- Our Tooltip --> <!-- Validation --> </div>

<div class="contourField text email textfield"><!-- Our label -->Email

<div><!-- The data entry control --></div>

<!-- Our Tooltip --> <!-- Validation --> </div>

<div class="contourField text enquirydetails textarea alternating"><!-- Our label -->Enquiry details

<div><!-- The data entry control --></div>

<!-- Our Tooltip --> <!-- Validation --> </div>

<div class="contourNavigation"></div>

</div>

<!-- endUmbMacro --></div>

This fails with a "Umbraco Contour will only work properly if placed inside a <form runat="server"> tag." error.

Obviously I can work around by creating the for with the headings, then removing them, but it's not exactly an obvious workaround.  I am sure this is something relatively simple to fix in the core code to prvent this.

Please note

I have # out some of the codes, just in case it create a security risk making them public.