Created attachment 328040 [details] Test program to see the behaviour Description of problem: OpenJDK has a bad behavior when it comes to display standard BorderLayout-based Swing GUIs. The BorderLayout.CENTER pane is always displayed even if there is nothing in it. Version-Release number of selected component (if applicable): java-1.6.0-openjdk-devel-1.6.0.0-7.b12.fc10.x86_64 java-1.6.0-openjdk-1.6.0.0-7.b12.fc10.x86_64 How reproducible: Always Steps to Reproduce: 1. Download the attached code (Main.java) 2. javac Main.java 3. java Main Actual results: You'll see a grey zone that shouldn't exist. Expected results: Only a green and red zone. Additional info: It works perfectly (expected result) with Sun's dk-6u11 (jdk-1.6.0_11-fcs.x86_64). The same good result can be seen on any Windows or OSX machine running JDK 1.5 or 1.6.
Created attachment 328041 [details] OpenJDK result
Created attachment 328042 [details] Expected result with Sun JDK
The problem is caused by a mistake in the calculation of the window size. Fixed upstream: http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2009-January/004455.html *** This bug has been marked as a duplicate of bug 452573 ***