When I went to edit my stable blocks today, the tab kept expanding out too far. It happened when I went to create a new block as well. I decided to clear my cache (needed to anyways to get my beta-banner back), and I thought it was fixed at first. I can click and edit the tab as normal, but if I click the negative space surrounding the tab (the borders, anything that isn't interactive), then it expands super far again. It also lets me scroll through it now. Pictures with the banner are post-cache clearing.