Thread:Extension talk:Header Tabs/HeaderTabs not Working in MediaWiki 1.17.0/reply (5)

In the past we have seen problems with the UsabilityInitiative extension, as a matter of fact UsabilityInitiative is deprecated beyond 1.16. Please see the notice on the Extension:UsabilityInitiative page. We are using HT 0.8.3 together with 1.17 successfully on private/semi-public wiki.