Why don't the BWT components repaint properly on the Windows platform?

If you run a Java application with multiple windows on Windows NT, and if the "show window contents while dragging" option is enabled, Java windows will not repaint properly. The repaint problem only occurs for Java windows running in the same Java VM. Repaint is fine for any regular Windows application. It is also fine for any Java app running in another VM. This problem occurs for any Java applet or application, not just JClass applets or applications. You can repeat this problem with the standard demos released with JDK 1.0.2. The problem only occurs with painted regions of an applet - peer components will update properly. This problem has been fixed in JDK 1.1. The workaround is to disable the "show contents while dragging" option.  more