User blog comment:Rupert Giles/Global Navigation January Update/@comment-452-20150203182043

For anyone wondering, the global nav update does includes changes which may break any custom personal CSS - this is entirely dependent on what CSS you're using.

Amongst other things, the new style for ".global-navigation .table-cell" is more specific than addressing only an ID, but prefixing all existing selectors with ".global-navigation" will fix most of them.

Here's the changes I made, other people's required changes will likely be different.

Wikia apparently really want the avatars to be round, so have replaced this: .AccountNavigation > li .avatar-container { border-radius: 50%; } with this much more specific selector: .AccountNavigation .account-navigation-first-item .avatar-container.logged-avatar { border-radius: 50%; }

There is still no scrollbar in the notifications panel:
 * Before, this meant you just couldn't access notifications that were too far down until you viewed the top notifications.
 * After tomorrow, the "Mark as read" button will be at the bottom of the notifications, and inaccessible if there are too many unread notifications.

This will enable the scrollbar, now and after the update: width: inherit; /*inherit required due to <1023px change */ max-height: 650px !important; /* inline style periodically reverts to auto */ overflow: hidden; } overflow-y: auto; height: inherit; max-height: inherit; } You will still need to "scroll down" to access the button, but that's better than it being completely inaccessible.
 * 1) GlobalNavigationWallNotifications #notificationsContainer {
 * 1) GlobalNavigationWallNotifications #notificationsContainer>ul {