Tab reordering. You can now move tabs left and right via the context menu. This is not an ideal method; drag & drop support will come for this, but this was a quick way to get the functionality into the app so that folks aren't stuck with their tab order.
Tab overflow controls. Tabs now display scroll buttons when they overflow their container. Again, another solution that's not ideal, but a quick way to get needed functionality into the app. Both of these tab-related features will be polished up in the near future.