I'm having problems getting web fonts to display correctly in my browser and have spent a few hours banging my head to narrow it down.
Basically, I have two web fonts installed: Helvetica Neue Regular and Helvetica Neue Bold, and I have noticed that they only display correctly, i.e. crisp and sharp, in Safari, but only on pages that have the fullscreen slideshow activated. On pages in Safari without the slideshow activated, they look swollen and, well, pretty terrible. In Chrome, I can't get them to display correctly regardless of whether or not the slideshow is activated—they're constantly swollen; Regular looks more like Medium.
I've made two screenshots that, hopefully, will illustrate the issue. They consist of two pages: one named 'Contact', which has the slideshow activated and one named 'Contact 2' which has no slideshow activated. I've split the screen to show Safari at the top and Chrome at the bottom.
I've tested these same web fonts with other themes on my current OS/browser setup with no issues. Hopefully we can get to the bottom of this one. Links to the pages in question here:
OS X 10.10.5