At this point I'm a bit amazed that Apple updated the other cursors. It's odd they updated the "link" cursor in Safari and the resize hand in the Finder but didn't link the latter to Safari too. Maybe it's a bit of a niche cursor?
Eh, I've filed several bug reports regarding the vectorized cursors. At this point, I'll doubt they'll bother fixing it. Maybe a point update to Safari will grab the newer cursor file, but if not, oh well, no big deal. But it is more noticeable than before giving that it's such an obvious low-res cursor compared to the newer ones.