User selected theme not applied to nodes

Using Drupal 6.19
Installed SwitchTheme 6.x-1.1(it's a beautiful thang!)

Users able to select theme of choice but chosen theme does not appear for published node content pages (eg. blog entries always appear in site default theme, not user selected theme).

ie - frontpage, account info, etc, and content creation appears in user selected theme, BUT published content always appears in site default theme.

Can view "in progress" version of site at ripmusic.com.au

Apologies if this has been covered elsewhere - have spent some time looking but couldn't find this specific issue (of course, this doesn't mean it's not out there - I just haven't managed to find it yet)

Regards
:-)
codare