title: Safari changing font weights when unrelated animations are running
body: <p>I'm using css animations on my page and Safari seems to change unrelated font weights elsewhere on the page when animations are running. Any idea why this happens? All other browsers work fine, include webkit ones like Chrome. </p>
  
  <p>I've detailed the bug in a video here - <a href="http://www.screenr.com/gZN8" rel="noreferrer">http://www.screenr.com/gZN8</a></p>
  
  <p>The site is also here - <a href="http://airport-r7.appspot.com/" rel="noreferrer">http://airport-r7.appspot.com/</a> but it might keep changing rapidly.</p>
  
  <p>I'm using compass (@transition-property, @transition-duration) on the arrow icons. No transitions applied on the heading that's flashing. On a Mac - so it might be the hardware acceleration, but I'm still trying to figure it out. </p>