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Created attachment 114046 [details] threaddump Product Version: NetBeans IDE 7.1 (Build 201112071828) Java: 1.7.0_02; Java HotSpot(TM) Client VM 22.0-b10 System: Linux version 3.0.0-14-generic running on i386; UTF-8; en_US (nb) 1. Run IDE in Unix OS (e.g. Linux Ubuntu). 2. Go to desktop, press somewhere right mouse button -> Change Desktop Background and there change OS theme. 3. Deadlock in IDE shows up (threaddump attached) I've tryed this with jdk demo app SwingSet2.jar (in jdk/demo/jfc/SwingSet2/) and same deadlock shows up, so it's problem of jdk. I've reported this bug here, because I'm not sure where JDK bugs could be reported directly...
Confirmed a regression in Java 7. The latest 6 update 30 works OK. Filed as a jdk bug #7123957.
*** Bug 213751 has been marked as a duplicate of this bug. ***