Check this page in panel, I did a quick hack, feel free to adjust:
<div style="max-width: 400px; margin: 0 auto;">[contact]</div>
It is working. The layout you had is considered "narrowest" in terms of general human reading width. Not really sure why you need the contact form narrower than that ... It doesn't help the visitor in any way, and it looks disproportionally small now.correiax wrote:Karl I sent you a PM with details so you can check why narrowest isn't working...