Index: src/main/java/common/java/awt/Window.java =================================================================== --- src/main/java/common/java/awt/Window.java (revision 515555) +++ src/main/java/common/java/awt/Window.java (working copy) @@ -975,7 +975,7 @@ String oldTitle = this.title; toolkit.lockAWT(); try { - this.title = title; + this.title = (title == null) ? "" : title; //$NON-NLS-1$ NativeWindow win = getNativeWindow(); if (win != null) { win.setTitle(title);