Opera has had web page zooming since version 5, which was released in December 2000.
Also, yeah, Calibri without ClearType just plain sucks. I might have to deinstall it from my PC - people are starting to use it more and more, without paying attention to millions of those who don’t have CT enabled, nor wish to enable it. Bad typography is basically on the level of “page designed for browser X, screw you if you’re not using it”.
Back on the topic of zooming: I wish every application supported it natively. Yes, there are different screen magnifiers, but sometimes they’re very awkward…