(Vector skin) Ever since the upgrade to 1.35, not the sidebars nor the vector tabs at the top of the page react to CSS, and the sidebars become distorted in their collapsible setting.
I saw your Vector.css, and I found some issues in it:
- div.vectorTabs should be nav.vectorTabs (or nav.vector-menu-tabs)
- div.vectorMenu should be nav.vectorMenu (or nav.vector-menu-dropdown)
- .vectorTabs span should be .vectorTabs a
because in MW 1.35, these elements had been changed or deleted.
I think if these changes applied, your wiki's tabs may be changes a bit.