I think I was onto something.
I was able to reproduce the problem by switching Font Size from Medium to Large. Did you do that or perhaps choose larger pixel size fonts under Customize Fonts? If the former, put the Font Size back to medium and if the latter, try to remember the size of the font but I think it's likely the first. See the attachment for where I'm talking about in Settings.
Enlarging fonts can mess with the layout because everything else may not scale proportionally. If you can't read the page, use the Page Zoom function. That does it proportionally.