This problem has been reported intermittently on the Solaris x86 platform, but it is possible that it also affects Solaris SPARC and Linux platforms.
The problem is that the installer\qs or uninstaller\qs first screen correctly displays the full text and “Help” and “Cancel” buttons, but the “Next” button necessary to navigate to the next screen is not visible. Although button is not visible, its area is active and if you click on it, navigation to the next screen proceeds normally. The cause of the problem is intermittent J2SE GUI repaint issue.
One workaround is to click on the Next button area just to the left of the Help button. Another workaround is to force repainting of the screen by resizing it slightly or by minimizing and restoring the installer window. After repainting, the missing Next button will become visible.