I'm using the latest version of Safari and the latest version of MacOS. Looking at the top level of Paizo pages, I see "My Account", "Cart", and "Help" on the right, with appropriate symbols. No problem so far. However, whenever I put anything in the cart, the "Cart" link and its icon move to the left (presumably to accommodate the presentation of the number of things in the cart). Now we have a problem: the "My Account" link doesn't move, so the "Cart" overlaps it. Not a fatal error, but it's ugly. I suspect a CSS problem, though I haven't dug into it. I figure I'd leave that for you guys. :-)
I guess I can now join all the other folks who feel like they're being ignored by Paizo. :-(