Yes I went to a 21st Century theme, as this one just isn’t being fixed. I’ve reported several problems but they’re never corrected.
Suggest you use a theme that’s entirely HTML5 and CSS3. There are lots of them, and the only one you should avoid is Montezuma. Why? Because they use a completely virtual setup system, which abstracts anything sensible from the actual code. You’ll spend less time with a white-label HTML5 theme, if you have any kind of quality standards.