Thanks Jian, I saw your solution, I'm just wondering if there's another way...
95% of my projects don't use jQuery, and in the couple that do I'm still struggling with conficts with the Microsoft Ajax libraries...
And honestly if there is a way to do this without having to touch-up every base template (my projects were creadted in RD5.5, back then the best practice was multiple base templates with target containers) in every project, that's what I would implement...
I know I said yesterday I'd prefer a solution I can implement from the templates, but turns out it would actually be very impractical...
I edited /cms/Webclient/App_Themes/Standard/Stylesheets/SmartPanel.css to hide #RD__ContentClasses_tab but then the remaining tabs overlap and the search tab gets hidden...
I'll fiddle with it a bit more but it seems - in my case - the css approach is easier...
Marc