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Product Version = NetBeans IDE 7.2 (Build 201207171143) Operating System = Linux version 3.2.0-31-generic running on amd64 Java; VM; Vendor = 1.6.0_24 Runtime = OpenJDK 64-Bit Server VM 20.0-b12 Working on Two Screens, they are show indepent. when netbeans works main screen, the toolbar dropdown menu will popup in the another screen. please see the attached image for details. but when netbeans works on another screen, the problem doesn't happen.
Created attachment 124556 [details] IDE log
Created attachment 124557 [details] Two Screens Problem On Kubuntu 12.04.1
Created attachment 124558 [details] Two Screens Problem On Kubuntu 12.04.1
Looks more like a JDK issue. Please try running some plain Swing app (e.g. SwingSet demo http://www.oracle.com/technetwork/java/demos-nojavascript-137100.html) using the same JDK and try reproducing the problem.
JDK not updated. in netbeans 7.3 beta. works well.