Something must have changed (obviously). Did you also try to use NB with your Ubuntu-installed version of GlassFish? Perhaps NB is installing incompatible versions of jsf-api/impl jar files? Without more investigation, I cannot say what is causing the problem.
However, an easy solution would be to re-install GlassFish. You can either do this via Ubuntu, or download it directly from
http://glassfish.dev.java.net. Before you uninstall GlassFish, I would backup your "domains" directory so you don't lose anything important.
Sorry for the inconvenience!
Ken Paulsen
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