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Build: NetBeans IDE 6.1 (Build 200804211638) VM: Java HotSpot(TM) Client VM, 10.0-b19, Java(TM) SE Runtime Environment, 1.6.0_05-b13 OS: Linux, 2.6.24-1-686, i386 User Comments:
Created attachment 61985 [details] stacktrace
This is random issue, right? If not, then please tell us reproducible set of steps that leads to error. By looking at the code, it seems that "mode" variable is null in Central.userClosedTopComponent - but I don't know how is this possible and we would need reproducible scenario to find out.
Without requested information for long time - INVALID. We can't do anything in this case, so please reporter add requested information and reopen issue. Thanks in advance.