For me the scrollbars show up, and we don't want to hide them actually so it's weird they don't show up for you. But it looks like the GUI is slightly different than default, so could it be some theme you're using?
Also any chance you could try prerelease 2.10.10 to see if it's any different? It's pretty much the final version we're going to release in a few days so it's safe to install: