In NSS 8.1.2 the user interface of Self Service has been enhanced throughout. The new top bar area reflects standard Veritas styling and incorporates links to newly designed ‘About’ pages.
The options of theming NSS has changed for the top bar as you can no longer change its colour , however you can still add a logo and change the background as before. The document attached to this post outlines the options available.
After an upgrade you may see previous theming not displaying as before, this can be easily modified by following the guidelines in the attached document.