Here is the code of the VERY SIMPLE test page I wrote :
[tab name="Un"]Premier texte[/tab]
[tab name="Deux"]Deuxieme texte[/tab]
Here is the Firefox JS console output :
[23:54:23,170] TypeError: tab_settings.enabled_tabs is undefined @ http://localhost:8888/mysite/wp-content/plugins/put/js/post-ui-tabs.js?ver=1.0.9:57
I have no other plugin installed, PUT is the firs one.
If you need more details, please ask... Thanks for your help !