You can find the answer to your question in the support ticket that you have opened about the same case.
In case our community is interested, here is our answer:
When using Visual Studio 2012 RadRibbonForm appears with incorrect layout, e.g. the system borders are thinner that they are supposed to be and the caption element is misplaced, so that a black line appears below the title. This is a known issue that we are currently working on it. I am exposing the item publicly to our Public Issue Tracker under ID 13556. To vote for it and subscribe for its status updates follow this link: http://www.telerik.com/support/pits.aspx#/public/winforms/13556. Please excuse us for the caused inconvenience. We will do our best to address the issue in a future release.
Currently, you can use the following snippet to move the caption element, so that the black line disappears:
Padding(0, 0, 0, 4);
A bit off topic, I would kindly ask you to use just one support channel to contact us. Posting the same questions twice or more may slow down our response time because we will need to review and address two or more tickets instead of one. Moreover threads are handled according to license and time of posting, so if it is an urgent issue, we suggest that you use a support ticket, which would be handled before a forum thread.
the Telerik team