I have an applet that has a number of frames with extensive GUI component usage. Some of them use double buffered panels, custom painting etc. The applet is run in IE under Microsoft VM. The problem occures unpredictably (sometime it does, sometimes it doesn't) in the form of the following exception: java.lang.NullPointerException at com/ms/awt/ZLabelPeer.update at com/ms/awt/WComponentPeer.doUpdate at com/ms/awt/WComponentPeer.paintNode at com/ms/ui/windowmanager/PaintRequest.run at com/ms/ui/windowmanager/RunnableMessage.run at com/ms/awt/WSystemQueue.getMessage at com/ms/awt/WEventQueue.getNextEvent at java/awt/EventDispatchThread.run After this, one of the components quits repainting properly. Can somebody help solve this issue? Thank you.