Since posting I switched over to Gnome-Shell. Same problem. I've also noticed that not only are the tabs gone but the buttons at the left hand side are gone as well (i.e. run and stepper).
In Unity I had the global-menu, but now in Gnome-shell I don't even get that. However, the menu is there just like the tabs were there. I can click where stuff should be and DrRacket will react accordingly. Basically, I'm flying blind outside of the interactions and definitions windows. -Logan
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