This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
There is a really old known "bug" in Java http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4143601 where a JTable inside a JScrollPane shows border even if "setBorder(null)" or "setViewportBorder(null)". When chosing "No Border" from the matisse editor, code is autogenerated with a null border. It would be best if it created instead a "new javax.swing.EmptyBorder(0,0,0,0)" which will always work and produce the desired results. A single EmptyBorder instance could be shared among all components.
*** This bug has been marked as a duplicate of bug 190167 ***