I used to have segments on my dashboard, next to stats and splits for each ride. It's no longer there?? I do have a section that lists all segments but not for a particular ride.
If you are complaining that the Segments widget is missing from the Dashboard then add it. If you are complaining that Segments tab is missing from one of you activities then post a link to it.
When I view details from a particular ride, I used to have segments that I crossed on that ride in the section where stats and splits are. No longer there??
This may be caused by your activity being "uncategorised". Change the category of the activity to either cycling or running and you should see the segments crossed tab reappear.
