The tab structure on the top of Blackboard has changed.
The Tabs or links at the top of the window are uased to navigate in and around the Blackboard System. Currently, there is only one level and they look something like this (depending on your role/permissions) (look to the links area after the answer to find links to full size pictures):
The new Tab Structure and layout out reflect a consolidation or collection of similar tabs together. The Welcome tab looks similar. There will be 2 levels on the resource tabs: