Bah, you think that's bad? Currently there's a nasty bug in iOS 9.2 where any webpage with an overflow:hidden style in the body tag will cause the viewport to be way too large, and consequently the webpage zooms out to far too large a size.

Apple can't fix this until the next update, yet it's a problem in Safari. Now we have to wait till the next update to fix a pretty bad problem.

You can see this, incidentally, if you browse to Libreoffice's opengrok.