Hello,
look at https://issues.apache.org/ooo/show_bug.cgi?id=120481
120481 only with MacOsX

Andre says: 
"First tests showed no problems with other drag-and-drop operations but an exhaustive test of all combinations of drag sources and drop targets is nearly impossible."

Other drag-and-drop does not work only with MacOsX : in Database.

1. With any database to add a
head of column from database "Table1"
to
Insert column in "Table Control" in Form (without passing by Table Element Wizard)

Procedure : - "Table1" open
- Forms > Create Form in Design View...>
- Forms Control > More Control > Table Control : draw any Table Control, but click on Cancel of "Table Element Wizard",
Try drag one head of column of Table1
To the head of "Table Control"
Editing  with Windows :
http://user.services.openoffice.org/fr/forum/download/file.php?id=47045&t=1


2. Between 2 databases
By opening 2 bases, the original and its copy, if we make one drag-and-drop of form from a base(basis) to the other one, It does not work :  It is necessary to pass by one to Copy / Paste 
(Only in the display  of Forms and not in that of the Tables)

Could you verify if your previous modifications correct these 2 cases ( I have not the aoo3.5_r1378446) Otherwise excuse this doubloon.

Cordially