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1. Open any java class in separated window (img_01) 2. Drag and drop the top border of the window to the top op monitor (img_02, img_03) >> There is black place after resizing, it still remains (img_04) Product Version: NetBeans IDE 7.4 (Build 201310111528) Java: 1.7.0_51; Java HotSpot(TM) 64-Bit Server VM 24.51-b03 Runtime: Java(TM) SE Runtime Environment 1.7.0_51-b13 System: Windows 7 version 6.1 running on amd64; Cp1252; en_US (nb)
Created attachment 144027 [details] img_01
Created attachment 144028 [details] img_02
Created attachment 144029 [details] img_03
Created attachment 144030 [details] img_04
This a JDK bug reproducible with a plaing JFrame window.
*** This bug has been marked as a duplicate of bug 225680 ***