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I have a laptop running XP and NetBeans 4.0 with the 1.4.2_07 JDK. When at home, I plug in my 17" LCD to get the most out of NetBeans, but there is a bug with either Swing or NetBeans that means that all the menus dropdowns and dropdown lists are displayed on the primary monitor, rather the secondary monitor where NetBeans is running. Menus and dropdown lists are always displayed at the rightmost edge of the primary monitor suggesting that their position is being limited based on the size of the primary monitor, rather than the entire viewport. This defect doesn't affect the main menu captions (eg: File, Edit, etc) or the dropdown controls themselves, only the windows that they create when activated.
Created attachment 21019 [details] An example of the issue
*** This issue has been marked as a duplicate of 47719 ***
Yes, it's a duplicate. Running NetBeans with the -J-Dnetbeans.popup.no_hack=true option should fix the problem.