JavaFX_NB_Plugin_NB65_promoted #89 14-Nov-2008 13:59:29
  Product Version         = NetBeans IDE 6.5 (Build 200811100001)
  Operating System        = Windows XP version 5.1 running on x86
  Java; VM; Vendor        = 1.6.0_11; Java HotSpot(TM) Client VM 11.0-b16; Sun Microsystems Inc.


It is rarely reproduced issue so the steps below do not always hang the IDE.
- Create a JavaFX Script project
- Run it in Browser
- Switch the execution model to the Mobile Emulator
  IDE hangs from time to time.

Or it sometimes hangs when I switch the execution model  
from mobile emulator to Run in Browser.

But I have a thread dump. May be it helps:

"AWT-EventQueue-1" prio=6 tid=0x2d73c400 nid=0xe44 waiting for monitor entry [0x2f25e000..0x2f25fb94]
   java.lang.Thread.State: BLOCKED (on object monitor)
	at
org.netbeans.modules.javafx.project.classpath.BootClassPathImplementation.getResources(BootClassPathImplementation.java:83)
	- waiting to lock <0x070c39c8> (a org.netbeans.modules.javafx.project.classpath.BootClassPathImplementation)
	at org.netbeans.api.java.classpath.ClassPath.entries(ClassPath.java:294)
	at org.netbeans.modules.java.source.usages.ClassPathRootsListener.handleClassPath(ClassPathRootsListener.java:152)
	- locked <0x07e552d0> (a org.netbeans.modules.java.source.usages.ClassPathRootsListener)
	at org.netbeans.modules.java.source.usages.ClassPathRootsListener.propertyChange(ClassPathRootsListener.java:330)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
	at org.netbeans.api.java.classpath.ClassPath.firePropertyChange(ClassPath.java:558)
	at org.netbeans.api.java.classpath.ClassPath$SPIListener.propertyChange(ClassPath.java:958)
	at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:186)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
	at
org.netbeans.modules.javafx.project.classpath.BootClassPathImplementation.resetCache(BootClassPathImplementation.java:147)
	at
org.netbeans.modules.javafx.project.classpath.BootClassPathImplementation.propertyChange(BootClassPathImplementation.java:122)
	at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:186)
	at org.netbeans.spi.project.support.ant.PropertyUtils$SequentialPropertyEvaluator.stateChanged(PropertyUtils.java:876)
	at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:319)
	at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:123)
	at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:109)
	at org.netbeans.spi.project.support.ant.ProjectProperties$PP$2.run(ProjectProperties.java:332)
	at org.netbeans.spi.project.support.ant.ProjectProperties$PP$2.run(ProjectProperties.java:331)
	at org.openide.util.Mutex.readAccess(Mutex.java:285)
	at org.netbeans.spi.project.support.ant.ProjectProperties$PP.fireChange(ProjectProperties.java:338)
	at org.netbeans.spi.project.support.ant.ProjectProperties$PP.put(ProjectProperties.java:210)
	at org.netbeans.spi.project.support.ant.ProjectProperties.putProperties(ProjectProperties.java:123)
	at org.netbeans.spi.project.support.ant.AntProjectHelper$6.run(AntProjectHelper.java:698)
	at org.netbeans.spi.project.support.ant.AntProjectHelper$6.run(AntProjectHelper.java:697)
	at org.openide.util.Mutex.writeAccess(Mutex.java:394)
	at org.netbeans.spi.project.support.ant.AntProjectHelper.putProperties(AntProjectHelper.java:696)
	at org.netbeans.modules.java.api.common.ant.UpdateHelper$2.run(UpdateHelper.java:114)
	at org.openide.util.Mutex.writeAccess(Mutex.java:469)