DropOnLayout error message
When attempting to edit the content on one of my Pages after dragging and dropping 2 subsequent document links on my Page, I received a DropOnLayout error message.
It seems that I consistently receive this error message when adding more than 1 Document Link control to my Page.
I am using Sitefinity v. 4.2.
I have attached a screenshot for your review.
I think that your problem is related to the issue described in this article: http://www.sitefinity.com/devnet/kb/sitefinity-4-x/users-who-are-not-administrators-cannot-drop-controls-on-layout-elements.aspx
Can you try the solution and see if you are still getting this error.