javax.imageio.IIOException: Unexpected block type 0!
        at com.sun.imageio.plugins.gif.GIFImageReader.readMetadata(GIFImageReader.java:722)
        at com.sun.imageio.plugins.gif.GIFImageReader.read(GIFImageReader.java:794)
        at javax.imageio.ImageIO.read(ImageIO.java:1422)
        at javax.imageio.ImageIO.read(ImageIO.java:1374)
        at org.openide.util.IconManager.getIcon(IconManager.java:307)
        at org.openide.util.IconManager.getIcon(IconManager.java:212)
        at org.openide.util.Utilities.loadImage(Utilities.java:2617)
        at org.netbeans.modules.options.colors.ColorModel.getAnnotations(ColorModel.java:143)
        at org.netbeans.modules.options.colors.AnnotationsPanel.getAnnotations(AnnotationsPanel.java:362)
        at org.netbeans.modules.options.colors.AnnotationsPanel.update(AnnotationsPanel.java:199)
        at org.netbeans.modules.options.colors.FontAndColorsPanel.update(FontAndColorsPanel.java:189)
        at org.netbeans.modules.options.colors.FontAndColorsPanelController.update(FontAndColorsPanelController.java:86)
        at org.netbeans.modules.options.CategoryModel$Category.update(CategoryModel.java:368)
        at org.netbeans.modules.options.OptionsPanel.setCurrentCategory(OptionsPanel.java:167)
        at org.netbeans.modules.options.OptionsPanel.access$100(OptionsPanel.java:87)
        at org.netbeans.modules.options.OptionsPanel$CategoryButton.mouseReleased(OptionsPanel.java:499)
        at java.awt.Component.processMouseEvent(Component.java:6038)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5803)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4410)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3986)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2429)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at org.netbeans.core.TimeableEventQueue.dispatchEvent(TimeableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)