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Product Version: NetBeans IDE Dev (Build 200808250201) Java: 1.6.0_10-rc; Java HotSpot(TM) Client VM 11.0-b13 System: Linux version 2.6.24-19-generic running on i386; UTF-8; en_US (nb) When dragging a panel in a JFrame form, some other items in the form are not visible (only while dragging). This problem exist only in some rather rare circumstances -> P4. To reproduce: drag a yellow panel that is inside the JFrame form in the project I will send you.
Created attachment 68224 [details] Project with a JFrame where this issue can be reproduced.
This is as designed. This situation occurs when components are pasted into the form. The pasted components are placed in a separate temporary layer. It is not allowed to put additional components into this layer. In fact, it is expected that the user will use drag and drop to incorporate the pasted components into the main layer. The components from the temporary layer are hidden when some component is dragged to emphasize that it is not possible to put (place next to, align with) the dragged component into the temporary layer. In your case, the buttons jButton5, jButton6 and jButton7 are in the temporary layer. Hence, they are hidden when one of them (or other components) are moved.
Heh, I get it... it is actually written in the hint in the top, if I didn't close it... Verified.