-transform:scale causing 'blinking' when hovering

I've had success adding

-webkit-backface-visibility: hidden;

to the offending element (.swatch in your case).

However, test it in older versions of Chrome and Safari to make sure it doesn't break anything else. In my experience, Safari 4 specifically isn't a big fan.

I had the same problem at this morning. But I found an answer on the web few moments ago.

To prevent the Blink issue, put the follow property on your .swatch class (not on :hover):

-webkit-transform-style: preserve-3d;