User blog comment:Anon3610/Tabber Update/@comment-31892545-20170921201752/@comment-31892545-20170922195227

I've received a response that seems to be in line with the Community Central forum I linked. The issues we see are caching issues. After they updated the tabber code, some pages need to be refreshed in order to display their tabbers again. They said this will occur naturally over the next few days, but an edit on an afflicted page will restore its original state (as we've seen this week). They have fixed issues in Winwatch and Musa's gallery.