The spiffy new Help Center presents an attractive, easy-to-use layout, but the page doesn't adapt to text zoom as well as the rest of the site does. This is the page with three levels of zoom (my usual for reading Mi Yodeya):
(Firefox 18.0.1, Windows XP.)
The overlapping text (and button) in the first column is particularly problematic. Yeah, the text also spills out of the bounding box in the "how it works" section, but that's merely an issue of attractiveness, while the overlapping text impedes function. Both matter, but the latter matters more.
As I said, the rest of the site works pretty well with my text zoom; there are some glitches, but the main page adjusts itself so question titles and tags don't overlap, text doesn't spill into the right-side links, and so on. It's just this one page where I'm seeing a bigger problem.